[1] Catholic Univ Louvain, Pole Rech Endocrinol Diabete & Nutr, 54 Ave Hippocrate, B-1200 Brussels, Belgium
[2] Clin Univ St Luc, Dept Biol Clin, Brussels, Belgium
[3] Catholic Univ Louvain, Brussels, Belgium
[4] Clin Univ St Luc, Pole Rech Endocrinol Diabete & Nutr, Inst Rech Expt & Clin, Brussels, Belgium