[1] Odense Univ Hosp, Dept Endocrinol, DK-5000 Odense C, Denmark
[2] Odense Univ, DK-5230 Odense M, Denmark
[3] Queens Univ Belfast, Belfast, Antrim, North Ireland
[4] Univ Verona, I-37100 Verona, Italy
[5] Univ Naples Federico II, Naples, Italy
[6] Univ Turin, Turin, Italy
[7] Univ Padua, Padua, Italy
[8] CNR, Inst Clin Physiol, I-56100 Pisa, Italy
[9] Univ Cattolica Sacro Cuore, Rome, Italy
[10] Univ Naples Federico II, Naples, Italy
[11] Heidelberg Univ, Heidelberg, Germany
[12] Univ Munich, Munich, Germany
[13] Stadtklin, Baden Baden, Germany
[14] Univ Geneva, Geneva, Switzerland
[15] Lund Univ, Lund, Sweden
[16] Univ Gothenburg, Gothenburg, Sweden
[17] Univ Kuopio, FIN-70211 Kuopio, Finland
[18] Univ Helsinki, Helsinki, Finland
[19] Univ Belgrade, Belgrade, Yugoslavia
[20] Univ Athens, Athens, Greece