Fig. 1

Study Selection Process to Identify Cases of Photodistributed Steven’s–Johnson Syndrome and Toxic Epidermal Necrolysis. a Focused searches were first looked at before broader results. As focused results found fewer and no unique articles to be included in the study, only broader results were computed in the analysis. b Additional registers/repositories searched: National Technical Information Service (NTIS), Social Science Research Network (SSRN), ClinicalTrials.org, Sigma Repository. c Searches that produced > 150 results, the first 150 were screened for inclusion and others removed. d USA.org did not report total results for each search, but first 150 results of each search were screened (those with > 150). TRIP  TRIP medical database. OAIster OAIster: Find the Pearls, NYAGLR   New York Academy of Medicine Grey Literature Report, SJS   Steven’s–Johnson syndrome, TEN  Toxic epidermal necrolysis, BASE   Bielefeld Academic Search Engine, Grey Matters   Grey Matters: a practical search tool for health-related grey literature, MCRP  Medicine Case Reports and Protocols, UVR   Ultraviolet radiation. Table modified from: Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, et al. The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. BMJ 2021;372:n71. https://doi.org/10.1136/bmj.n71