A Comprehensive Bibliographic Review Concerning the Efficacy of Organic Acids for Chemical Peels Treating Acne Vulgaris

Șoimița Emiliana Măgerușan, Gabriel Hancu, Aura Rusu, Șoimița Emiliana Măgerușan, Gabriel Hancu, Aura Rusu

Abstract

Acne vulgaris stands out as the most prevalent skin disorder among teenagers and young adults, causing physical discomfort and considerable economic and psychological burdens on individuals and society. A wide range of topical and systemic therapies are available in acne treatment. Chemical peeling is a skin resurfacing technique designed to rebuild healthy skin using exfoliating substances, a simple and affordable process with various dermatological uses. Chemical peels, classified as superficial, medium, and deep, have been utilized for acne vulgaris and multiple other skin issues. In these chemical peels, a diverse range of chemical substances is employed, each with its unique mode of action. Among these, α-hydroxy and β-hydroxy acids have gathered attention for their efficacy in reducing acne lesions and enhancing overall skin appearance. Acids, such as salicylic acid, glycolic acid, or lactic acid, are commonly used in chemical peels due to their exfoliating and sebum-regulating properties. Despite the widespread use of these acids, there exists a lack of consensus regarding the most effective acid type and concentration for treating acne-prone skin. This review aims to bridge this knowledge gap by evaluating the effectiveness and safety of various organic acids used in chemical peels specifically for acne-prone skin. The findings of this comprehensive bibliographic review indicate that organic acid-based chemical peels represent effective and safe treatment options for individuals with acne-prone skin. Their adaptability sets these treatments apart; the choice of organic acid can be tailored to meet individual patient needs and tolerability levels. This personalized approach ensures that patients receive optimal care while minimizing the risks associated with the treatment. As research in this field progresses, it is anticipated that a more nuanced understanding of the ideal acid type and concentration will emerge, further enhancing the efficacy and safety of chemical peels for acne-prone skin.

Keywords: acne vulgaris; chemical peels; α-hydroxy acids; β-hydroxy acids.

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Azelaic acid chemical structure and the IUPAC name: nonanedioic acid.
Figure 2
Figure 2
Thricloracetic acid chemical structure and the IUPAC name: 2,2,2-trichloroacetic acid.
Figure 3
Figure 3
Glycolic acid chemical structure and the IUPAC name: 2-hydroxyacetic acid.
Figure 4
Figure 4
Lactic acid chemical structure and the IUPAC name: 2-hydroxypropanoic acid.
Figure 5
Figure 5
Pyruvic acid chemical structure.
Figure 6
Figure 6
Ascorbic acid chemical structure and the IUPAC name: ((2R)-2-[(1S)-1,2-dihydroxyethyl]-3,4-dihydroxy-2H-furan-5-one).
Figure 7
Figure 7
Citric acid chemical structure and the IUPAC name: 2-hydroxypropane-1,2,3-tricarboxylic acid.
Figure 8
Figure 8
Malic acid chemical structure and the IUPAC name: 2-hydroxybutanedioic acid.
Figure 9
Figure 9
Tartaric acid chemical structure and the IUPAC name: 2,3-dihydroxybutanedioic acid.
Figure 10
Figure 10
Mandelic acid chemical structure and the IUPAC name: 2-hydroxy-2-phenylacetic acid.
Figure 11
Figure 11
Salicylic acid chemical structure and the IUPAC name: 2-hydroxybenzoic acid.
Figure 12
Figure 12
Kojic acid chemical structure and the IUPAC: 5-hydroxy-2-(hydroxymethyl)pyran-4-one.
Figure 13
Figure 13
Polyhydroxy acids chemical structures ((a)—gluconolactone; (b)—lactobionic acid; (c)—galactose).

References

    1. Williams H.C., Dellavalle R.P., Garner S. Acne vulgaris. Lancet. 2012;379:361–372.
    1. Tuchayi S.M., Makrantonaki E., Ganceviciene R., Dessinioti C., Feldman S.R., Zouboulis C.C. Acne vulgaris. Nat. Rev. Dis. Primers. 2015;1:15029.
    1. Kanwar I.L., Haider T., Kumari A., Dubey S., Jain P., Soni V. Models for acne: A comprehensive study. Drug Discov. Ther. 2018;12:329–340.
    1. Beylot C. Mechanisms and causes of acne. Rev. Prat. 2002;52:828–830.
    1. Heng A.H.S., Chew F.T. Systematic review of the epidemiology of acne vulgaris. Sci. Rep. 2020;10:5754.
    1. O’Brien S.C., Lewis J.B., Cunliffe W.J. The Leeds revised acne grading system. J. Dermatol. Treat. 1998;9:215–220.
    1. Ramli R., Malik A.S., Hani A.F.M., Jamil A. Acne analysis, grading and computational assessment methods: An overview. Ski. Res. Technol. 2012;18:1–14.
    1. Rocha M.A., Bagatin E. Adult-onset acne: Prevalence, impact, and management challenges. Clin. Cosmet. Investig. Dermatol. 2018;11:59–69.
    1. Leyden J.J. A review of the use of combination therapies for the treatment of acne vulgaris. J. Am. Acad. Dermatol. 2003;49:S200–S210.
    1. Krautheim A., Gollnick H.P. Acne: Topical treatment. Clin. Dermatol. 2004;22:398–407.
    1. Katsambas A., Papakonstantinou A. Acne: Systemic treatment. Clin. Dermatol. 2004;22:412–418. doi: 10.1016/j.clindermatol.2004.03.014.
    1. Cooper A.J., Harris V.R. Modern management of acne. Med. J. Aust. 2017;206:41–45.
    1. Fox L., Csongradi C., Aucamp M., Du Plessis J., Gerber M. Treatment modalities for acne. Molecules. 2016;21:1063. doi: 10.3390/molecules21081063.
    1. O’Connor A.A., Lowe P.M., Shumack S., Lim A.C. Chemical peels: A review of current practice. Australas. J. Dermatol. 2018;59:171–181. doi: 10.1111/ajd.12715.
    1. Soleymani T., Lanoue J., Rahman Z. A practical approach to chemical peels: A review of fundamentals and step-by-step algorithmic protocol for treatment. J. Clin. Aesthetic Dermatol. 2018;11:21.
    1. Lee K.C., Wambier C.G., Soon S.L., Sterling J.B., Landau M., Rullan P., Brody H.J. Basic chemical peeling: Superficial and medium-depth peels. J. Am. Acad. Dermatol. 2019;81:313–324. doi: 10.1016/j.jaad.2018.10.079.
    1. Kontochristopoulos G., Platsidaki E. Chemical peels in active acne and acne scars. Clin. Dermatol. 2017;35:179–182. doi: 10.1016/j.clindermatol.2016.10.011.
    1. Castillo D.E., Keri J.E. Chemical peels in the treatment of acne: Patient selection and perspectives. Clin. Cosmet. Investig. Dermatol. 2018;11:365–372. doi: 10.2147/CCID.S137788.
    1. Al-Talib H., Al-Khateeb A., Hameed A., Murugaiah C. Efficacy and safety of superficial chemical peeling in treatment of active acne vulgaris. An. Bras. Dermatol. 2017;92:212–216. doi: 10.1590/abd1806-4841.20175273.
    1. Berson D.S., Cohen J.L., Rendon M.I., Roberts W.E., Starker I., Wang B. Clinical role and application of superficial chemical peels in today’s practice. J. Drugs Dermatol. JDD. 2009;8:803–811.
    1. Monheit G.D. Medium-depth chemical peels. Dermatol. Clin. 2001;19:413–425. doi: 10.1016/S0733-8635(05)70282-5.
    1. Camacho F.M. Medium-depth and deep chemical peels. J. Cosmet. Dermatol. 2005;4:117–128. doi: 10.1111/j.1473-2165.2005.40213.x.
    1. Chen X., Wang S., Yang M., Li L. Chemical peels for acne vulgaris: A systematic review of randomised controlled trials. BMJ Open. 2018;8:e019607. doi: 10.1136/bmjopen-2017-019607.
    1. Fischer T.C., Perosino E., Poli F., Viera M.S., Dreno B., Cosmetic Dermatology European Expert Group Chemical peels in aesthetic dermatology: An update 2009. J. Eur. Acad. Dermatol. Venereol. 2010;24:281–292. doi: 10.1111/j.1468-3083.2009.03409.x.
    1. Sieber M.A., Hegel J.K.E. Azelaic acid: Properties and mode of action. Ski. Pharmacol. Physiol. 2014;27:9–17. doi: 10.1159/000354888.
    1. Schulte B.C., Wu W., Rosen T. Azelaic acid: Evidence-based update on mechanism of action and clinical application. J. Drugs Dermatol. 2015;14:964–968.
    1. Webster G. Combination azelaic acid therapy for acne vulgaris. J. Am. Acad. Dermatol. 2000;43:S47–S50. doi: 10.1067/mjd.2000.108318.
    1. Brody H.J. Trichloroacetic acid application in chemical peeling. Oper. Tech. Plast. Reconstr. Surg. 1995;2:127–128. doi: 10.1016/S1071-0949(05)80007-1.
    1. Collins P.S. Trichloroacetic acid peels revisited. J. Dermatol. Surg. Oncol. 1989;15:933–940. doi: 10.1111/j.1524-4725.1989.tb03180.x.
    1. Nguyen T.H., Rooney J.A. Trichloroacetic acid peels. Dermatol. Ther. 2000;13:173–182. doi: 10.1046/j.1529-8019.2000.00020.x.
    1. Slavin J.W. Trichloroacetic acid peels. Aesthetic Surg. J. 2004;24:469–470. doi: 10.1016/j.asj.2004.07.008.
    1. Sharad J. Glycolic acid peel therapy–a current review. Clin. Cosmet. Investig. Dermatol. 2013;6:281–288. doi: 10.2147/CCID.S34029.
    1. Atzori L., Brundu M.A., Orru A., Biggio P. Glycolic acid peeling in the treatment of acne. J. Eur. Acad. Dermatol. Venereol. 1999;12:119–122. doi: 10.1111/j.1468-3083.1999.tb01000.x.
    1. Murad H., Shamban A.T., Premo P.S. The use of glycolic acid as a peeling agent. Dermatol. Clin. 1995;13:285–307. doi: 10.1016/S0733-8635(18)30082-2.
    1. Grover C., Reddu B.S. The therapeutic value of glycolic acid peels in dermatology. Indian J. Dermatol. Venereol. Leprol. 2003;69:148.
    1. Martinez F.A.C., Balciunas E.M., Salgado J.M., González J.M.D., Converti A., de Souza Oliveira R.P. Lactic acid properties, applications, and production: A review. Trends Food Sci. Technol. 2013;30:70–83. doi: 10.1016/j.tifs.2012.11.007.
    1. Abd Alsaheb R.A., Aladdin A., Othman N.Z., Abd Malek R., Leng O.M., Aziz R., El Enshasy H.A. Lactic acid applications in pharmaceutical and cosmeceutical industries. J. Chem. Pharm. Res. 2015;7:729–735.
    1. Sharquie K.E., Al-Tikreety M.M., Al-Mashhadani S.A. Lactic acid as a new therapeutic peeling agent in melasma. Dermatol. Surg. 2005;31:149–154. doi: 10.1097/00042728-200502000-00005.
    1. Liu L., Li Y., Du G.-C., Chen J. Biotechnological production of pyruvic acid. Appl. Microbiol. Biotechnol. 2001;57:451–459.
    1. Cotellessa C., Manunta T., Ghersetich I., Brazzini B., Peris K. The use of pyruvic acid in the treatment of acne. J. Eur. Acad. Dermatol. Venereol. 2004;18:275–278. doi: 10.1111/j.1468-3083.2004.00759.x.
    1. Njus D., Kelley P.M., Tu Y.J., Schlegel H.B. Ascorbic acid: The chemistry underlying its antioxidant properties. Free Radic. Biol. Med. 2020;159:37–43. doi: 10.1016/j.freeradbiomed.2020.07.013.
    1. Aboul-Einien M.H., Kandil S.M., Abdou E.M., Diab H.M., Zaki M.S. Ascorbic acid derivative-loaded modified aspasomes: Formulation, in vitro, ex vivo and clinical evaluation for melasma treatment. J. Liposome Res. 2020;30:54–67. doi: 10.1080/08982104.2019.1585448.
    1. Berovic M., Legisa M. Citric acid production. Biotechnol. Annu. Rev. 2007;13:303–343.
    1. Fabbrocini G., De Padova M.P., Tosti A. Chemical peels: What’s new and what isn’t new but still works well. Facial Plast. Surg. 2009;25:329–336. doi: 10.1055/s-0029-1243082.
    1. Kövilein A., Kubisch C., Cai L., Ochsenreither K. Malic acid production from renewables: A review. J. Chem. Technol. Biotechnol. 2020;95:513–526. doi: 10.1002/jctb.6269.
    1. Jackson A. Chemical peels. Facial Plast. Surg. 2014;30:026–034. doi: 10.1055/s-0033-1364220.
    1. Versari A., Castellari M., Spinabelli U., Galassi S. Recovery of tartaric acid from industrial enological wastes. J. Chem. Technol. Biotechnol. 2001;76:485–488. doi: 10.1002/jctb.412.
    1. Jacobs S.W., Culbertson E.J. Effects of topical mandelic acid treatment on facial skin viscoelasticity. Facial Plast. Surg. 2018;34:651–656. doi: 10.1055/s-0038-1676048.
    1. Sarkar R., Garg V., Bansal S., Sethi S., Gupta C. Comparative evaluation of efficacy and tolerability of glycolic acid, salicylic mandelic acid, and phytic acid combination peels in melasma. Dermatol. Surg. 2016;42:384–391. doi: 10.1097/DSS.0000000000000642.
    1. Davies M., Marks R. Studies on the effect of salicylic acid on normal skin. Br. J. Dermatol. 1976;95:187–192. doi: 10.1111/j.1365-2133.1976.tb00825.x.
    1. Arif T. Salicylic acid as a peeling agent: A comprehensive review. Clin. Cosmet. Investig. Dermatol. 2015;8:455–461. doi: 10.2147/CCID.S84765.
    1. Lee H.S., Kim I.H. Salicylic acid peels for the treatment of acne vulgaris in Asian patients. Dermatol. Surg. 2013;29:1196–1199.
    1. Kligman D., Kligman A.M. Salicylic acid peels for the treatment of photoaging. Dermatol. Surg. 1998;24:325–328. doi: 10.1111/j.1524-4725.1998.tb04162.x.
    1. Bentley R. From miso, sake and shoyu to cosmetics: A century of science for kojic acid. Nat. Prod. Rep. 2006;23:1046–1062. doi: 10.1039/b603758p.
    1. Rosfarizan M., Mohd S.M., Nurashikin S., Madihah M.S., Arbakariya B.A. Kojic acid: Applications and development of fermentation process for production. Biotechnol. Mol. Biol. Rev. 2010;5:24–37.
    1. Saeedi M., Eslamifar M., Khezri K. Kojic acid applications in cosmetic and pharmaceutical preparations. Biomed. Pharmacother. 2019;110:582–593. doi: 10.1016/j.biopha.2018.12.006.
    1. Yu R.J., Van Scott E.J. Alpha-hydroxyacids and carboxylic acids. J. Cosmet. Dermatol. 2004;3:76–87. doi: 10.1111/j.1473-2130.2004.00059.x.
    1. Green B.A. Cosmeceuticals and Cosmetic Practice. Wiley Online Library; 2013. Cosmeceutical uses and benefits of alpha, poly- and bionic hydroxy acids; pp. 67–80.
    1. Green B.A., Ruey J.Y., Van Scott E.J. Clinical and cosmeceutical uses of hydroxyacids. Clin. Dermatol. 2009;27:495–501. doi: 10.1016/j.clindermatol.2009.06.023.
    1. Algiert-Zielińska B., Mucha P., Rotsztejn H. Lactic and lactobionic acids as typically moisturizing compounds. Int. J. Dermatol. 2019;58:374–379. doi: 10.1111/ijd.14202.
    1. Landau M. Chemical peels. Clin. Dermatol. 2008;26:200–208. doi: 10.1016/j.clindermatol.2007.09.012.
    1. Mcgloin C. Chemical peels: A review of types, applications, and complications. J. Aesthetic Nurs. 2018;7:422–426. doi: 10.12968/joan.2018.7.8.422.
    1. Wiegmann D., Haddad L. Two is better than one: The combined effects of glycolic acid and salicylic acid on acne-related disorders. J. Cosmet. Dermatol. 2020;19:2349–2351. doi: 10.1111/jocd.13387.
    1. Jartarkar S.R., Gangadhar B., Mallikarjun M., Manjunath P. A randomized, single-blind, active controlled study to compare the efficacy of salicylic acid and mandelic acid chemical peel in the treatment of mild to moderately severe acne vulgaris. Clin. Dermatol. Rev. 2017;1:15–18. doi: 10.4103/2542-551X.196946.
    1. Atwa M.A., Ahmed A.H., Nada H.A., Refaey S.M., Jafferany M., Elsaie M.L. Combined chemical peels versus trichloroacetic acid (TCA) for treating melasma: A split face study. J. Dermatol. Treat. 2022;33:959–964. doi: 10.1080/09546634.2020.1793888.
    1. Kligman D.E., Draelos Z.D. Combination Superficial Peels with Salicylic Acid and Post-Peel Retinoids. J. Drugs Dermatol. 2016;15:442–450.
    1. Liu H., Yu H., Xia J., Liu L., Liu G.J., Sang H., Peinemann F. Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne. Cochrane Database Syst. Rev. 2020;5:CD011368.
    1. Wójcik A., Kubiak M., Rotsztejn H. Influence of azelaic and mandelic acid peels on sebum secretion in ageing women. Adv. Dermatol. Allergol. 2013;30:140–145. doi: 10.5114/pdia.2013.35614.
    1. Piquero V., Moya D., La Rotta E.E. Minimally Invasive Aesthetic Procedures: A Guide for Dermatologists and Plastic Surgeons. Springer; Berlin/Heidelberg, Germany: 2020. Jessner’s peel for the face; pp. 87–94.
    1. Monheit G.D. The Jessner’s+ TCA peel: A medium-depth chemical peel. J. Dermatol. Surg. Oncol. 1989;15:945–950. doi: 10.1111/j.1524-4725.1989.tb03181.x.
    1. Sharquie K.E., Al-Tikreety M.M., Al-Mashhadani S.A. Lactic acid chemical peels as a new therapeutic modality in melasma in comparison to Jessner’s solution chemical peels. Dermatol. Surg. 2006;32:1429–1436. doi: 10.1111/j.1524-4725.2006.32352.x.
    1. Amer Ejaz N.R., Iftikhar N., Muzzafar F. Comparison of 30% salicylic acid with Jessner’s solution for superficial chemical peeling in epidermal melasma. J. Coll. Physicians Surg. Pak. 2008;18:205–208.
    1. Kessler E., Flanagan K., Chia C., Rogers C., Anna Glaser D.E.E. Comparison of α-and β-hydroxy acid chemical peels in the treatment of mild to moderately severe facial acne vulgaris. Dermatol. Surg. 2008;34:45–51. doi: 10.1097/00042728-200801000-00008.
    1. Jae J., Dong Ju H., Dong Hyun K., Yoon M.S., Lee H.J. Comparative study of buffered 50% glycolic acid (pH 3.0) + 0.5% salicylic acid solution vs. Jessner’s solution in patients with acne vulgaris. J. Cosmet. Dermatol. 2018;17:797–801. doi: 10.1111/jocd.12445.
    1. Hay R.A., Hegazy R., Hady M.A., Saleh N. Clinical and dermoscopic evaluation of combined (salicylic acid 20% and azelaic acid 20%) versus trichloroacetic acid 25% chemical peel in acne: An RCT. J. Dermatol. Treat. 2019;30:572–577.
    1. Chilicka K., Rogowska A.M., Szyguła R., Dzieńdziora-Urbińska I., Taradaj J. A comparison of the effectiveness of azelaic and pyruvic acid peels in the treatment of female adult acne: A randomized controlled trial. Sci. Rep. 2020;10:12612. doi: 10.1038/s41598-020-69530-w.
    1. Kim S.W., Moon S.E., Kim J.A., Eun H.C. Glycolic acid versus Jessner’s solution: Which is better for facial acne patients? A randomized prospective clinical trial of split-face model therapy. Dermatol. Surg. 1999;25:270–273. doi: 10.1046/j.1524-4725.1999.08251.x.
    1. Garg V.K., Sinha S., Sarkar R. Glycolic acid peels versus salicylic–mandelic acid peels in active acne vulgaris and post-acne scarring and hyperpigmentation: A comparative study. Dermatol. Surg. 2009;35:59–65. doi: 10.1097/00042728-200901000-00009.
    1. İlknur T., Demirtaşoğlu M., Biçak M.Ü., Özkan Ş. Glycolic acid peels versus amino fruit acid peels for acne. J. Cosmet. Laser Ther. 2010;12:242–245. doi: 10.3109/14764172.2010.514919.
    1. El Refaei A.M., Salam H.A.A., Sorour N.E. Salicylic–mandelic acid versus glycolic acid peels in Egyptian patients with acne vulgaris. J. Egypt. Women’s Dermatol. Soc. 2015;12:196–202. doi: 10.1097/01.EWX.0000464740.18592.42.
    1. Rafique S., Abaidullah M., Saeed M., Shahzad A., Muqeet N., Hamid H. Clinical efficacy of salicylic acid (20%) and glycolic acid (35%) peel in post acne scarring; randomized controlled trials. Lat. Am. J. Pharm. 2020;39:1139–1143.
    1. Manjhi M., Yadav P., Yadav A., Sagar V., Ramesh V. A comparative study of 50 % glycolic acid peel and 30 % salicylic acid peel in mild to moderate acne—A split face study. J. Evid. Based Med. Healthc. 2020;7:2954–2958.
    1. Pavithra S., Gopalakrishnan K., Shanmugam J. Efficacy of 70% glycolic acid peel versus 30% salicylic acid peel in the treatment of mild to moderate acne vulgaris: A retrospective study. J. Clin. Diagn. Res. 2022;16:WC5–WC8. doi: 10.7860/JCDR/2022/57286.17124.
    1. Bae B.G., Park C.O., Shin H., Lee S.H., Lee Y.S., Lee S.J., Chung K.J., Lee K.H., Lee J.H. Salicylic acid peels versus Jessner’s solution for acne vulgaris: A comparative study. Dermatol. Surg. 2013;39:248–253. doi: 10.1111/dsu.12018.
    1. Dayal S., Amrani A., Sahu P., Jain V.K. Jessner’s solution vs. 30% salicylic acid peels: A comparative study of the efficacy and safety in mild-to-moderate acne vulgaris. J. Cosmet. Dermatol. 2017;16:43–51. doi: 10.1111/jocd.12266.
    1. Nofal E., Nofal A., Gharib K., Nasr M., Abdelshafy A., Elsaid E. Combination chemical peels are more effective than single chemical peel in treatment of mild-to-moderate acne vulgaris: A split face comparative clinical trial. J. Cosmet. Dermatol. 2018;17:802–810. doi: 10.1111/jocd.12763.
    1. How K.N., Lim P.Y., Wan Ahmad Kammal W.S.L., Shamsudin N. Efficacy and safety of Jessner’s solution peel in comparison with salicylic acid 30% peel in the management of patients with acne vulgaris and postacne hyperpigmentation with skin of color: A randomized, double-blinded, split-face, controlled trial. Int. J. Dermatol. 2020;59:804–812. doi: 10.1111/ijd.14948.
    1. Zdrada J., Odrzywotek W., Deda A., Wilczymski S. A split-face comparative study to evaluate the efficacy of 50% pyruvic acid against a mixture of glycolic and salicylic acids in the treatment of acne vulgaris. J. Cosmet. Dermatol. 2020;19:2352–2358. doi: 10.1111/jocd.13288.
    1. Dayal S., Kalra K.D., Sahu P. Comparative study of efficacy and safety of 45% mandelic acid versus 30% salicylic acid peels in mild-to-moderate acne vulgaris. J. Cosmet. Dermatol. 2020;19:393–399. doi: 10.1111/jocd.13168.
    1. Dréno B., Fischer T.C., Perosino E., Poli F., Viera M.S., Rendon M.I., Wang B. Expert opinion: Efficacy of superficial chemical peels in active acne management–what can we learn from the literature today? Evidence-based recommendations. J. Eur. Acad. Dermatol. Venereol. 2011;25:695–704. doi: 10.1111/j.1468-3083.2010.03852.x.
    1. Chilicka K., Gold M.H., Nowicka D. Acne vulgaris and the most popular and new cosmetological treatments. J. Cosmet. Dermatol. 2023;22:1946–1950. doi: 10.1111/jocd.15757.

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