1. From the Department of Clinical Physiology, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden (K.C.); Research Institute for Internal Medicine (T.U., P.A.), Section of Clinical Immunology and Infectious Diseases (P.A.), Department of Endocrinology, Oslo University Hospital Rikshospitalet (T.U.), and Faculty of Medicine, University of Oslo (P.A.), Oslo, Norway.