[1] Univ Childrens Hosp Basel, Div Med Genet, Res Grp Human Genet, Basel, Switzerland
[2] Univ Basel, Dept Biomed, Basel, Switzerland
[3] Univ Basel Hosp, Dept Obstet & Gynecol, CH-4031 Basel, Switzerland
[4] Mendrisio Hosp, Dept Pediat, Bellinzona, Switzerland
[5] Bellinzona Hosp, Dept Pediat, Bellinzona, Switzerland
[6] Cantonal Hosp, Ctr Lab Med, Aarau, Switzerland