The methods report is published in December 2010 in the Journal of the European Academy of Dermatology and Venereology:
Pathirana D, Nast A, Ormerod AD, Reytan N, Saiag P, Smith CH, et al. On the development of the European S3 guidelines on the systemic treatment of psoriasis vulgaris: structure and challenges. J Eur Acad Dermatol Venereol. 2010 Dec:1458-67.