Rainer H Straub1, Firdaus S Dhabhar, Johannes W J Bijlsma, Maurizio Cutolo. 1. Laboratory of Neuroendocrinoimmunology, Division of Rheumatology, Dept. of Internal Medicine I, University Hospital Regensburg, 93042 Regensburg, Germany. rainer.straub@klinik.uni-regensburg.de