[1] Natl Genet Reference Lab Wessex, Salisbury, Wilts, England
[2] Univ Jena, Inst Human Genet & Anthropol, D-6900 Jena, Germany
[3] Univ Tubingen, Dept Med Genet, D-72074 Tubingen, Germany
[4] Salisbury Dist Hosp, Wessex Reg Genet Lab, Salisbury, Wilts, England
[5] Univ Southampton, Sch Med, Southampton Gen Hosp, Div Human Genet, Southampton SO9 5NH, Hants, England