Erythematous reactions to two ultraviolet excimer therapy devices with different irradiance levels: Reconsidering the reciprocity law.

"data availability statement the data that support the findings of this study are openly available in jrct at https://jrct niph go jp/en-latest-detail/jrcts032190128"

"CONFLICT OF INTEREST STATEMENT Dr. Togawa reports receiving grants from the JEMC during the conduct of the study and receiving grants from CASIO and the CASIO Science Promotion Foundation outside the submitted work. Dr. Matsue reports receiving grants from CASIO outside the submitted work. The other authors have no conflicts of interest."

"We thank all the participants of the study for granting publishing permission. We also thank Kyoko Inamasu and all the staff of the JMEC for their technical guidance on the measuring instruments (Mexameter MX18 and CM‐700d). This study was funded by JMEC. The funder loaned excimer light (ExSys308/model 50) and measuring instruments (Mexameter MX18 and CM‐700d), participated in the design, and provided data on the specifications of the excimer light devices (ExSys308/model 50 and VTRAC) but was not involved in the management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; or the decision to submit the manuscript for publication."

"This study was conducted from November 5, 2019 to May 14, 2020, at the Department of Dermatology, Chiba University, in compliance with ethical guidelines for medical research in humans, clinical research methods, and the Declaration of Helsinki. This clinical study was approved by the Clinical Research Review Board of Chiba University Hospital (approval number: 837). All participants provided written informed consent. The study trial was registered in the Japan Registry of Clinical Trials (Trial ID, jRCTs032190128; registration link: https://jrct.niph.go.jp/en‐latest‐detail/jRCTs032190128)."