Clinical Trials on Penetrating Head Injury

Total 18256 results

Zhujiang Hospital
Guangdong Xiangxue Precision Medical Technology Co., Ltd.; Xiangxue Life Science... and other collaborators

Completed

To Evaluate the Efficacy of NY-ESO-1-specific T Cell Receptor Affinity Enhancing Specific T Cell in Solid Tumors

Solid Tumor | Breast Cancer Stage IV | Gastric Cancer Stage IV | Ovarian Cancer Stage IV | Liver Cancer Stage IV | Esophageal Cancer, Stage IV | Bone and Soft Tissue Tumors | Bladder Carcinoma Stage IV | Prostate Carcinoma Stage IV | Thyroid Cancer Stage IV

China
Regenstrief Institute, Inc.
Merck Sharp & Dohme LLC; Indiana University

Completed

HPV Vaccination: An Investigation of Physician Reminders and Recommendation Scripts

Cervical Cancer | Oropharyngeal Cancer | Genital Warts | Human Papilloma Virus Infection Type 11 | Human Papilloma Virus Infection Type 16 | Human Papilloma Virus Infection Type 18 | Human Papilloma Virus Infection Type 6
Ottawa Regional Cancer Centre

Completed

Combination Chemotherapy and Tamoxifen in Treating Patients With Solid Tumors

Sarcoma | Head and Neck Cancer | Brain and Central Nervous System Tumors | Malignant Mesothelioma | Liver Cancer | Pheochromocytoma | Adrenocortical Carcinoma

Canada
Massachusetts General Hospital
National Cancer Institute (NCI)

Terminated

Escitalopram in Treating Depression in Patients With Advanced Lung or Gastrointestinal Cancer

Depression | Fatigue | Gastric Cancer | Colorectal Cancer | Pancreatic Cancer | Esophageal Cancer | Lung Cancer | Liver Cancer | Gallbladder Cancer | Extrahepatic Bile Duct Cancer

United States
FeRx

Completed

Magnetic-Targeted Doxorubicin in Treating Patients With Cancer Metastatic to the Liver

Melanoma | Sarcoma | Stomach Neoplasms | Gastrointestinal Neoplasms | Breast Neoplasms | Lung Neoplasms | Liver Neoplasms | Colorectal Neoplasms | Pancreatic Neoplasms | Esophageal Neoplasms | Metastases, Neoplasm | Cholangiocarcinoma

United States, Germany
Hospices Civils de Lyon

Recruiting

Predictive Value of Progastrin Titer at Diagnosis and of Progastrin Kinetics During Treatment in Cancer Patients (ONCOPRO)

Melanoma | B-cell Lymphoma | Cancer | Breast Cancer | Head and Neck Cancer | Glioblastoma | Gastric Cancer | Colorectal Cancer | Pancreatic Cancer | Esophageal Cancer | Ovarian Cancer | Lung Cancer | Prostate Cancer | Bladder Cancer | Endometrial Cancer | Renal Cancer | Hepatocellular Cancer

France
Loxo Oncology, Inc.
Eli Lilly and Company

Recruiting

A Study of Selpercatinib (LOXO-292) in Participants With Advanced Solid Tumors, RET Fusion-Positive Solid Tumors, and Medullary Thyroid Cancer (LIBRETTO-001) (LIBRETTO-001)

Non-Small Cell Lung Cancer | Colon Cancer | Medullary Thyroid Cancer | Any Solid Tumor

United States, Japan, Taiwan, Australia, Korea, Republic of, Israel, Spain, Switzerland, Singapore, France, Canada, Italy, Germany, United Kingdom, Hong Kong, Denmark
National Cancer Institute (NCI)

Active, not recruiting

Testing the Addition of an Anticancer Drug, BAY 1895344, to the Usual Chemotherapy With FOLFIRI in Advanced or Metastatic Cancers of the Stomach and Intestines

Clinical Stage III Gastric Cancer AJCC v8 | Clinical Stage III Gastroesophageal Junction Adenocarcinoma AJCC v8 | Clinical Stage IV Gastric Cancer AJCC v8 | Clinical Stage IV Gastroesophageal Junction Adenocarcinoma AJCC v8 | Metastatic Gastroesophageal Junction Adenocarcinoma | Metastatic... and other conditions

United States
M.D. Anderson Cancer Center
National Cancer Institute (NCI)

Active, not recruiting

Docetaxel, Cisplatin and Fluorouracil in Treating Patients With Previously Untreated Stage II-IV Nasal Cavity and Paranasal Sinus Cancer

Sinonasal Undifferentiated Carcinoma | Locally Advanced Nasal Cavity and Paranasal Sinus Squamous Cell Carcinoma | Nasal Cavity and Paranasal Sinus Poorly Differentiated Carcinoma | Stage II Nasal Cavity and Paranasal Sinus Cancer AJCC v8 | Stage III Nasal Cavity and Paranasal Sinus Cancer... and other conditions

United States
National Cancer Institute (NCI)

Completed

Lapatinib in Treating Patients With Recurrent and/or Metastatic Adenoid Cystic Cancer or Other Salivary Gland Cancers

Recurrent Salivary Gland Cancer | Recurrent Adenoid Cystic Carcinoma of the Oral Cavity | High-grade Salivary Gland Carcinoma | High-grade Salivary Gland Mucoepidermoid Carcinoma | Low-grade Salivary Gland Carcinoma | Low-grade Salivary Gland Mucoepidermoid Carcinoma | Salivary Gland Acinic Cell... and other conditions

Canada
Regenstrief Institute, Inc.
Merck Sharp & Dohme LLC; Indiana University

Completed

HPV Vaccination: Evaluation of Reminder Prompts for Doses 2 & 3

Cervical Cancer | Oropharyngeal Cancer | Genital Warts | Human Papilloma Virus Infection Type 11 | Human Papilloma Virus Infection Type 16 | Human Papilloma Virus Infection Type 18 | Human Papilloma Virus Infection Type 6

United States
Children's Oncology Group
National Cancer Institute (NCI); National Center for Complementary and Integrative...

Completed

Electroacupuncture in Treating Delayed Nausea and Vomiting in Patients Receiving Chemotherapy For Newly Diagnosed Childhood Sarcoma, Neuroblastoma, Nasopharyngeal Cancer, Germ Cell Tumors, or Hodgkin Lymphoma

Sarcoma | Lymphoma | Head and Neck Cancer | Nausea | Vomiting | Ovarian Cancer | Neuroblastoma | Brain Tumors | Central Nervous System Tumors | Extragonadal Germ Cell Tumor | Childhood Germ Cell Tumor

United States
Celldex Therapeutics

Completed

A Study of the PD-L1xCD27 Bispecific Antibody CDX-527 in Patients With Advanced Malignancies

Renal Cell Carcinoma | Breast Cancer | Head and Neck Cancer | Gastric Cancer | Esophageal Cancer | Ovarian Cancer | Fallopian Tube Cancer | Cholangiocarcinoma | Non-small Cell Lung Cancer | Primary Peritoneal Carcinoma | Hepatic Cancer | Bladder Urothelial Carcinoma | Other Solid Tumors | MSI-H Colorectal Cancer

United States
National Cancer Institute (NCI)

Terminated

A Phase I/II Study of Oblimersen Plus Cisplatin and Fluorouracil in Gastric & Esophageal Junction Cancer

Adenocarcinoma of the Gastroesophageal Junction | Stage IV Gastric Cancer | Recurrent Gastric Cancer | Squamous Cell Carcinoma of the Esophagus | Adenocarcinoma of the Esophagus | Recurrent Esophageal Cancer | Stage IV Esophageal Cancer | Diffuse Adenocarcinoma of the Stomach | Intestinal Adenocarcinoma... and other conditions

United States
National Cancer Institute (NCI)

Completed

Akt Inhibitor MK2206 in Treating Patients With Progressive, Recurrent, or Metastatic Adenoid Cyst Carcinoma

Recurrent Salivary Gland Carcinoma | Stage IVA Major Salivary Gland Cancer AJCC v7 | Stage IVB Major Salivary Gland Cancer AJCC v7 | Stage IVC Major Salivary Gland Cancer AJCC v7 | Salivary Gland Adenoid Cystic Carcinoma | Recurrent Oral Cavity Adenoid Cystic Carcinoma | Stage IVA Oral Cavity... and other conditions

United States
City of Hope Medical Center
National Cancer Institute (NCI)

Completed

Pilot Trial of CRLX101 in Treatment of Patients With Advanced or Metastatic Stomach, Gastroesophageal, or Esophageal Cancer That Cannot be Removed by Surgery

Adenocarcinoma of the Gastroesophageal Junction | Stage IV Gastric Cancer | Recurrent Gastric Cancer | Squamous Cell Carcinoma of the Esophagus | Adenocarcinoma of the Esophagus | Recurrent Esophageal Cancer | Stage IV Esophageal Cancer | Diffuse Adenocarcinoma of the Stomach | Intestinal Adenocarcinoma... and other conditions

United States
Yang Yang

Unknown

PD-1 Knockout EBV-CTLs for Advanced Stage Epstein-Barr Virus (EBV) Associated Malignancies

Stage IV Adult Hodgkin Lymphoma | Stage IV Nasopharyngeal Carcinoma | Stage IV Diffuse Large B-Cell Lymphoma | Stage IV Gastric Carcinoma | T-Cell Lymphoma Stage IV

China
University of Michigan Rogel Cancer Center

Completed

Study of High-Dose Chemotherapy With Bone Marrow or Stem Cell Transplant for Rare Poor-Prognosis Cancers

Nasopharyngeal Cancer | Fibrosarcoma | Wilms Tumor | Brain Tumor, Recurrent | Carcinoma, Round Cell

United States
Johnson & Johnson Pharmaceutical Research & Development...

Completed

The Effect of Epoetin Alfa on the Anemia of Patients With Selected Cancers Receiving Chemotherapy

Lymphoma | Breast Cancer | Multiple Myeloma | Anemia | Ovarian Cancer | Prostate Cancer | Neoplasm | Esophagus Cancer | Carcinoma, Small Cell Lung
Roswell Park Cancer Institute
National Cancer Institute (NCI)

Withdrawn

Botanical Therapy in Treating Mucositis in Patients With Head and Neck Cancer Who Have Undergone Chemoradiation Therapy

Mucositis | Tongue Cancer | Recurrent Squamous Cell Carcinoma of the Hypopharynx | Recurrent Squamous Cell Carcinoma of the Larynx | Recurrent Squamous Cell Carcinoma of the Lip and Oral Cavity | Recurrent Squamous Cell Carcinoma of the Oropharynx | Recurrent Squamous Cell Carcinoma of the Paranasal... and other conditions
Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
Shenshan Medical Center, Memorial Hospital of Sun Yat-sen University

Not yet recruiting

Administration of Hyperthermic Intraperitoneal Chemotherapy in the General Ward (GARD-HIPEC)

Epithelial Ovarian Cancer

China
ABIGO Medical AB

Not yet recruiting

Clinical Investigation of Sorbact® Dressings

Hard-to-heal Wounds | Diabetic Foot Ulcer | Venous Leg Ulcer | Pressure Ulcer | Arterial Leg Ulcer
Centre Oscar Lambret

Recruiting

Hyperthermic Intraperitoneal Chemotherapy (HIPEC) in Ovarian Cancer (CHIPPI) (CHIPPI)

Ovarian Cancer | Ovarian Carcinoma | Ovary Neoplasms

France, Belgium
Memorial Sloan Kettering Cancer Center
Mayo Clinic; University of Chicago; University of Pittsburgh; Baptist Health South... and other collaborators

Active, not recruiting

Outcomes After Secondary Cytoreductive Surgery With or Without Carboplatin Hyperthermic Intraperitoneal Chemotherapy (HIPEC) Followed by Systemic Combination Chemotherapy for Recurrent Platinum-Sensitive Ovarian, Fallopian Tube, or Primary Peritoneal Cancer

Ovarian Cancer | Peritoneal Cancer | Fallopian Tubes Cancer

United States
Instituto para el Desarrollo Biotecnológico y la...
Corporación de Fomento de la Producción, Chile

Recruiting

Cell Therapy for Diabetic Foot Ulcer

Wound Heal | Diabetic Foot Ulcer Associated With Type II Diabetes Mellitus

Chile
OhioHealth
Noxsano, Inc.

Terminated

Safety and Efficacy of the Noxsano Wound Care Bandage

Diabetic Foot Ulcer | Peripheral Artery Disease | Wound Heal | Arterial Insufficiency | Ulcer Foot | Ulcer, Leg

United States
CAI Hongbing

Recruiting

A Randomized Prospective Trail of HIPEC in Recurrent Ovarian Cancer Patients With HRR Mutation

Ovarian Cancer | Epithelial Ovarian Cancer | Ovarian Cancer, Epithelial | Hyperthermic Intraperitoneal Chemotherapy(HIPEC) | Homologous Recombination Repair Gene Mutation

China
Göteborg University
Vastra Gotaland Region; Sahlgrenska University Hospital, Sweden

Unknown

Fever After Tick Bite Study (FATB)

Tick-Borne Diseases | Encephalitis, Tick-Borne | Tick Bites | Tick-Bite; Fever | Tick Fever

Sweden
Leigh R. Hochberg, MD, PhD.
National Institute on Deafness and Other Communication Disorders (NIDCD)

Recruiting

Feasibility of the BrainGate2 Neural Interface System in Persons With Tetraplegia (BG-Speech-01)

Amyotrophic Lateral Sclerosis | Muscular Dystrophies | Spinal Cord Injuries | Tetraplegia | Dysarthria | Brain Stem Infarctions | Locked in Syndrome | Anarthria

United States
University Medical Center Groningen

Recruiting

Acutelines: a Large Data-/Biobank of Acute and Emergency Medicine (Acutelines)

Pneumonia | Sepsis | Shock | Hemorrhage | Emergencies | Thrombosis | Frailty | Syncope | Urinary Tract Infections | Acute Kidney Injury | Acute Disease | Pulmonary Embolism | Dyspnea | Anaphylaxis | Polypharmacy | Complication of Treatment | Electrolyte Disturbance | Skin Infection | Intoxication by Drug

Netherlands
University of Michigan
National Institute on Disability, Independent Living, and Rehabilitation...

Completed

Clinical Trial of a Serious Game for Individuals With SCI/D

Spinal Cord Diseases | Spinal Stenosis | Spinal Cord Injury | Spina Bifida | Syringomyelia | Spinal Neoplasms | Transverse Myelitis | Spinal Cord Involvement | Polio and Post-polio Syndrome

United States
Wen-Shiou Pan

Completed

Explore the Sharing Model Intervene to Improve the Knowledge, Attitudes, Service Intentions and Service Start-up Effects of the Eight Major Non-cancer Disease End-stage Caregivers on Well-being and Palliative Care

Heart Failure | Stroke | Pulmonary Disease, Chronic Obstructive | Kidney Failure, Chronic | Alzheimer Disease, Late Onset | Kidney Failure, Acute | Cystic Fibrosis Pulmonary Exacerbation | Chronic Liver Disease and Cirrhosis

Taiwan
Duke University
Eunice Kennedy Shriver National Institute of Child Health and Human Development... and other collaborators

Recruiting

Pharmacokinetics, Pharmacodynamics, and Safety Profile of Understudied Drugs Administered to Children Per Standard of Care (POPS) (POPS or POP02)

Heart Failure | Pain | Pneumonia | Hypertension | Edema | Hemophilia | Insomnia | Pulmonary Arterial Hypertension | Coagulation Disorder | Asthma in Children | Down Syndrome | Attention Deficit Hyperactivity Disorder | Bronchopulmonary Dysplasia | Hypokalemia | Hyperphosphatemia | Primary Hyperaldosteronism | Adrenal Insufficiency and other conditions

United States, Canada
Zhujiang Hospital
National Natural Science Foundation of China

Recruiting

A Multicentre Study on Features of the Gut Microbiota of Patients With Critical Chronic Diseases in China

Epilepsy | Chronic Kidney Diseases | Nasopharyngeal Cancer | Gastric Cancer | Pancreatic Cancer | Lung Cancer | Essential Hypertension | Acute Coronary Syndrome | Primary Aldosteronism | Liver Cancer | Subclinical hypothyroïdism

China
National Cancer Institute (NCI)

Recruiting

Using Nivolumab Alone or With Cabozantinib to Prevent Mucosal Melanoma Return After Surgery

Mucosal Melanoma | Anal Melanoma | Bladder Melanoma | Cervical Melanoma | Esophageal Melanoma | Gallbladder Melanoma | Mucosal Melanoma of the Head and Neck | Mucosal Melanoma of the Urinary System | Oral Cavity Mucosal Melanoma | Penile Mucosal Melanoma | Rectal Melanoma | Recurrent Mucosal Melanoma | Sinonasal... and other conditions

United States, Canada
UNICANCER

Recruiting

Study Comparing the Standard Administration of IO Versus the Same IO Administered Each 3 Months in Patients With Metastatic Cancer in Response After 6 Months of Standard IO (MOIO)

Melanoma | Renal Cell Carcinoma | Head and Neck Cancer | Hepatocellular Carcinoma | Lung Cancer Metastatic | Bladder Cancer | Triple Negative Breast Cancer | Merkel Cell Carcinoma

France
University College, London
University College London Hospitals

Completed

Oral Epithelial Dysplasia Informational Needs Questionnaire (ODIN-Q)

Quality of Life | Precancerous Conditions | Patient Engagement | Patient Participation | Oral Disease | Patient Satisfaction | Health Behavior | Precancerous Lesions | Oral Leukoplakia | Dental Diseases | Oral Lichen Planus | Dysplasia | Patient Preference | Information Seeking Behavior | Oral Epithelial Dysplasia | Oral... and other conditions

United Kingdom
National Institutes of Health Clinical Center (CC)
National Cancer Institute (NCI)

Completed

Combination Chemotherapy in Treating Patients With Recurrent, Refractory, or Metastatic Solid Tumors or Lymphomas

Lymphoma | Colorectal Cancer | Pancreatic Cancer | Esophageal Cancer | Small Intestine Cancer | Lung Cancer | Unspecified Adult Solid Tumor, Protocol Specific | Liver Cancer | Gallbladder Cancer | Extrahepatic Bile Duct Cancer

United States
National Cancer Institute (NCI)

Recruiting

Tiragolumab and Atezolizumab for the Treatment of Relapsed or Refractory SMARCB1 or SMARCA4 Deficient Tumors

Malignant Solid Neoplasm | Rhabdoid Tumor | Refractory Malignant Solid Neoplasm | Recurrent Malignant Solid Neoplasm | Recurrent Rhabdoid Tumor | Refractory Rhabdoid Tumor | Epithelioid Sarcoma | Kidney Medullary Carcinoma | Atypical Teratoid/Rhabdoid Tumor | Poorly Differentiated Chordoma | Recurrent Atypical... and other conditions

United States, Australia, Canada
Merus N.V.

Available

Early Access Program Providing HER2/HER3 Bispecific Antibody, MCLA-128, for a Patient With Advanced NRG1-Fusion Positive Solid Tumor

Renal Cell Carcinoma | Breast Cancer | Head and Neck Cancer | Colorectal Cancer | Pancreatic Cancer | Prostate Cancer | Non Small Cell Lung Cancer | Cholangiocarcinoma | Solid Tumor, Unspecified, Adult | Unknown Primary Tumors | NRG1 Fusion
Incyte Corporation
Merck Sharp & Dohme LLC

Completed

Study to Explore the Safety, Tolerability and Efficacy of MK-3475 in Combination With INCB024360 in Participants With Selected Cancers

Melanoma | Lymphoma | Head and Neck Cancer | Gastric Cancer | Ovarian Cancer | Hepatocellular Carcinoma (HCC) | Lung Cancer | Bladder Cancer | Endometrial Cancer | Solid Tumors | Renal Cell Carcinoma (RCC) | Triple Negative Breast Cancer (TNBC) | UC (Urothelial Cancer) | Microsatellite-instability (MSI) High Colorectal...

United States
Fore Biotherapeutics

Terminated

Phase I/IIa Study to Evaluate the Safety, PK, PD, and Preliminary Efficacy of PLX8394 in Patients With Advanced Cancers.

Melanoma | Colorectal Cancer | Cholangiocarcinoma | Non-small Cell Lung Cancer | Histiocytosis | Thyroid Cancer | Hairy Cell Leukemia

United States
Roswell Park Cancer Institute
National Cancer Institute (NCI); National Comprehensive Cancer Network

Completed

Pralatrexate and Oxaliplatin in Treating Patients With Unresectable or Metastatic Esophageal, Stomach, or Gastroesophageal Junction Cancer

Gastric Adenocarcinoma | Recurrent Gastric Carcinoma | Esophageal Undifferentiated Carcinoma | Gastric Squamous Cell Carcinoma | Adenocarcinoma of the Gastroesophageal Junction | Stage IV Gastric Cancer | Stage IIIB Gastric Cancer | Stage IIIC Gastric Cancer | Stage IV Esophageal Adenocarcinoma | Stage... and other conditions

United States
Centre Oscar Lambret

Terminated

Psychological and Emotional Impact in Patients Undergoing Treatment For Metastatic Cancer Either in a Clinical Trial or as Standard Off-Trial Therapy

Depression | Kidney Cancer | Breast Cancer | Gastric Cancer | Pancreatic Cancer | Esophageal Cancer | Small Intestine Cancer | Lung Cancer | Anal Cancer | Liver Cancer | Gallbladder Cancer | Anxiety Disorder

France
Memorial Sloan Kettering Cancer Center

Completed

Combination Chemotherapy Followed by Bone Marrow Transplantation in Treating Patients With Rare Cancer

Sarcoma | Lymphoma | Kidney Cancer | Testicular Germ Cell Tumor | Head and Neck Cancer | Ovarian Cancer | Neuroblastoma | Retinoblastoma | Liver Cancer | Extragonadal Germ Cell Tumor | Childhood Germ Cell Tumor

United States
Tempus AI

Recruiting

Tempus Priority Study: A Pan-tumor Observational Study

Lymphoma | Leukemia | Breast Cancer | Pancreatic Cancer | Ovarian Cancer | Fallopian Tube Cancer | Lung Cancer | Prostate Cancer | Brain Cancer | Bladder Cancer | Cancer of Head and Neck | Peritoneal Cancer | Cancer of Liver | Cancer of Stomach | Cancer of Cervix | Cancer of Colon | Cancer of Rectum | Cancer of Gastrointestinal... and other conditions

United States
Memgen, Inc.
H. Lee Moffitt Cancer Center and Research Institute; Duke Cancer Institute

Recruiting

MEM-288 Oncolytic Virus Alone and in Combination With Nivolumab in Solid Tumors Including Non-Small Cell Lung Cancer

Melanoma | Head and Neck Cancer | Pancreatic Cancer | Solid Tumor | Non Small Cell Lung Cancer | Metastatic Cancer | Triple Negative Breast Cancer | Advanced Cancer | Merkel Cell Carcinoma | Cutaneous Squamous Cell Carcinoma

United States
Novartis Pharmaceuticals

Active, not recruiting

Study of Safety and Efficacy of DKY709 Alone or in Combination With PDR001 in Patients With Advanced Solid Tumors.

Melanoma | Carcinoma, Non-Small-Cell Lung | Nasopharyngeal Carcinoma | Triple Negative Breast Cancer | Microsatellite Stable Colorectal Cancer

United States, Taiwan, Spain, Germany, Japan, Hong Kong
Rain Oncology Inc

Terminated

Milademetan in Advanced/Metastatic Solid Tumors

Melanoma | Sarcoma | Cervical Cancer | Testicular Germ Cell Tumor | Gastric Cancer | Non Small Cell Lung Cancer | Cholangiocarcinoma | Lung Adenocarcinoma | Solid Tumors | Pancreas Cancer | Head and Neck Carcinoma | Biliary Tract Cancer | Ovarian Carcinoma | Adrenocortical Carcinoma | Bladder Urothelial Carcinoma | Breast... and other conditions

United States
Exelixis

Active, not recruiting

Study of Cabozantinib in Combination With Atezolizumab to Subjects With Locally Advanced or Metastatic Solid Tumors

Renal Cell Carcinoma | Head and Neck Cancer | Hepatocellular Carcinoma | Gastric Cancer | Colorectal Cancer | Ovarian Cancer | Non-Small Cell Lung Cancer | Triple Negative Breast Cancer | Endometrial Cancer | Castration-resistant Prostate Cancer | Urothelial Carcinoma | Differentiated Thyroid Cancer | Gastroesophageal... and other conditions

United States, Australia, Belgium, France, Germany, Italy, Netherlands, Spain, United Kingdom

Clinical Trials on Penetrating Head Injury

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Guatemala

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations