S Langan, J Schmitt, P. J Coenraads, A Svensson, E von Elm, H Williams and for the European Dermato Epidemiology Network (EDEN)
Archives of Dermatology 146 ( 5 ): 534 - 541 , 2010
E von Elm, P Schoettker, I Henzi, J Osterwalder and B. Walder
BJA: British Journal of Anaesthesia 103 ( 3 ): 371 - 386 , 2009