[1] CATHOLIC UNIV LEUVEN,EXPTL MED & ENDOCRINOL LAB,B-3000 LOUVAIN,BELGIUM
[2] CATHOLIC UNIV LEUVEN,DEPT OBSTET & GYNECOL,B-3000 LOUVAIN,BELGIUM
[3] ACAD HOSP UTRECHT,BONE METAB CLIN RES GRP,UTRECHT,NETHERLANDS
[4] INSERM,U120,F-78110 LE VESINET,FRANCE
[5] CUNY MT SINAI SCH MED,DEPT ORTHOPED,NEW YORK,NY 10029