Journal Pre-proof Greater efficacy of SPF 100+ sunscreen compared to SPF 50+ in sunburn prevention during five consecutive days of sunlight exposure: A Randomized, Double-Blind Clinical Trial Indermeet Kohli, PhD, Cynthia L. Nicholson, MD, Joshua D. Williams, PhD, Alexis B. Lyons, MD, InSeok Seo, PhD, Prithwiraj Maitra, PhD, Xiaoyan Tian, MS, Evren Atillasoy, MD, Henry W. Lim, MD, Iltefat H. Hamzavi, MD PII: S0190-9622(19)32755-0 DOI: https://doi.org/10.1016/j.jaad.2019.09.018 Reference: YMJD 13829 To appear in: Journal of the American Academy of Dermatology Received Date: 25 June 2019 Revised Date: 9 September 2019 Accepted Date: 9 September 2019 Please cite this article as: Kohli I, Nicholson CL, Williams JD, Lyons AB, Seo I, Maitra P, Tian X, Atillasoy E, Lim HW, Hamzavi IH, Greater efficacy of SPF 100+ sunscreen compared to SPF 50+ in sunburn prevention during five consecutive days of sunlight exposure: A Randomized, Double-Blind Clinical Trial, Journal of the American Academy of Dermatology (2019), doi: https://doi.org/10.1016/ j.jaad.2019.09.018. This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2019 Published by Elsevier on behalf of the American Academy of Dermatology, Inc.