Affiliation: | J. Kottner,L. Jacobi,E. Hahnel,M. Alam,K. Balzer,D. Beeckman,C. Busard,J. Chalmers,S. Deckert,V. Eleftheriadou,K. Furlan,S.E.R. Horbach,J. Kirkham,A. Nast,Ph. Spuls,D. Thiboutot,L. Thorlacius,K. Weller,H.C. Williams,J. Schmitt,the International Cochrane Skin Group Core Outcome Set Initiative (CSG‐COUSIN) group |