[1] Groningen Univ Med Ctr, Dept Genet, Groningen, Netherlands
[2] Leiden Univ, Med Ctr, Dept Med Genet, Leiden, Netherlands
[3] Univ Cent Lancashire, Coll Hlth & Wellbeing, Preston, Lancs, England
[4] Ist Ricovero & Cura Carattere Sci, Dipartimento Ostetr Ginecol & Pediat, Reggio Emilia, Italy
[5] Univ Med Ctr Ljubljana, Clin Inst Med Genet, Ljubljana, Slovenia
[6] Katholieke Univ Leuven, Dept Human Genet, Leuven, Belgium
[7] Bispebjerg Hosp, Rigshosp, Med Genet & Genet Audiol, Copenhagen, Norway
[8] OUH Trust, Dept Clin Genet, Oxford, England
[9] OUH Trust, CEQAS, Oxford, England