[1] Clin Univ St Luc, Dept Lab Med, 10 Ave Hippocrate, B-1200 Brussels, Belgium
[2] Catholic Univ Louvain, 10 Ave Hippocrate, B-1200 Brussels, Belgium
[3] CHU Liege, Dept Endocrinol, Domaine Univ Sart Tilman, Liege, Belgium
[4] Vrije Univ Brussel, Univ Ziekenhuis Brussel, Dept Endocrinol, UZ Brussel,VUB, Brussels, Belgium
[5] AZ Brugge, Dept Endocrinol, Brugge, Belgium
[6] UZ Leuven, Dept Otorhinolaryngol, Sect Head & Neck Surg, Leuven, Belgium
[7] Ghent Univ Hosp, Dept Endocrinol, Ghent, Belgium
[8] Hop Erasme, Dept Endocrinol, Brussels, Belgium
[9] Hop Erasme, Dept Nucl Med, Brussels, Belgium
[10] Clin Univ St Luc, Dept Endocrinol, Brussels, Belgium
[11] Univ Hosp Leuven, Dept Endocrinol, Leuven, Belgium