[1] Middelheim Ziekenhuis Antwerpen, Dept Endocrinol, Antwerp, Belgium
[2] Univ Ziekenhuis Antwerpen, Dept Endocrinol, Antwerp, Belgium
[3] Univ Ziekenhuis Gent, Dept Endocrinol, Ghent, Belgium
[4] Clin Univ St Luc, Dept Endocrinol, B-1200 Brussels, Belgium
[5] Univ Liege, Dept Endocrinol, Liege, Belgium
[6] Univ Ziekenhuis Leuven, Dept Endocrinol, Louvain, Belgium
[7] Free Univ Brussels, Dept Endocrinol, Brussels, Belgium
[8] Osped Riuniti Bergamo, Dept Endocrinol, I-24100 Bergamo, Italy