Department of Health and Human Services FDA, USA. Sunscreen drug products for over the counter use: proposed safety, effectiveness and labelling conditions. Fed Regist. 1978;43(166):38206-38269.
2.
AutierPBoniolMSeveriGDoréJFEuropean Organizatin for Research and Treatment of Cancer Melanoma Co-operative Group. Quantity of sunscreen used by European students. Br J Dermatol. 2001;144(2):288-291.doi:10.1046/j.1365-2133.2001.04016.x
3.
WilliamsJD.MaitraP.AtillasoyE.WuM-M.FarbergAS.RigelDS. SPF 100+ sunscreen is more protective against sunburn than SPF 50+ in actual use: results of a randomized, double-blind, split-face, natural sunlight exposure clinical trial. J Am Acad Dermatol. 2018;78(5):902-910.doi:10.1016/j.jaad.2017.12.062
NealeR.WilliamsG.GreenA. Application patterns among participants randomized to daily sunscreen use in a skin cancer prevention trial. Arch Dermatol. 2002;138(10):1319-1325.doi:10.1001/archderm.138.10.1319