[1] UNIV SAO PAULO,HOSP CLIN,SCH MED,THYROID LAB,BR-05403 SAO PAULO,BRAZIL
[2] UNIV BUENOS AIRES,FAC FARM & BIOQUIM,CATEDRA GENET & BIOL MOLEC,RA-1113 BUENOS AIRES,ARGENTINA
[3] HOP ERASME,SERV GENET,B-1070 BRUSSELS,BELGIUM
[4] UNIV LIBRE BRUXELLES,INST RECH INTERDISCIPLINAIRE,B-1070 BRUSSELS,BELGIUM