[1] Massachusetts Gen Hosp, Neuroendocrine Clin Ctr, Boston, MA 02114 USA
[2] St Bartholomews Hosp, Dept Endocrinol, London EC1A 7BE, England
[3] Univ Birmingham, Queen Elizabeth Hosp, Div Med Sci, Birmingham B29 6JD, W Midlands, England
[4] Cedars Sinai Med Ctr, Dept Med, Los Angeles, CA 90048 USA
[5] Hop Cochin, Dept Endocrinol, Fac Med Paris Descartes, AP HP, F-75014 Paris, France
[6] Univ Erlangen Nurnberg, Neurochirurg Klin, D-91054 Erlangen, Germany
[7] Univ Naples Federico II, Dipartimento Endocrinol & Oncol Mol & Clin, I-80131 Naples, Italy
[8] Univ Med Ctr Nijmegen, Dept Endocrinol, NL-6000500 Nijmegen, Netherlands
[9] Erasmus MC, Div Endocrinol, Dept Internal Med, NL-3000 CA Rotterdam, Netherlands
[10] Univ Montreal, Ctr Hosp, Dept Med, Div Endocrinol, Montreal, PQ H2W 1T8, Canada
[11] Univ Sheffield, Sch Med, Sheffield S10 2TN, S Yorkshire, England
[12] NIH, Reprod Biol & Med Branch, Bethesda, MD 20892 USA
[13] Univ Essen Gesamthsch, Div Endocrinol, D-45122 Essen, Germany
[14] Univ Padua, Dept Stat Sci, I-35122 Padua, Italy
[15] Max Planck Inst Psychiat, Dept Endocrinol, D-80804 Munich, Germany
[16] Univ Virginia Hlth Syst, Charlottesville, VA 22903 USA
[17] Churchill Hosp, Oxford Ctr Diabet Endocrinol & Metab, Dept Endocrinol, Oxford OX3 7LJ, England
[18] Polytech Univ Marche, Div Endocrinol, Inst Internal Med, I-60126 Ancona, Italy