[1] Royal Hosp Sick Children, Ferguson Smith Ctr Clin Genet, Glasgow G3 8SJ, Lanark, Scotland
[2] Royal Hosp Sick Children, Duncan Guthrie Inst Med Genet, Glasgow G3 8SJ, Lanark, Scotland
[3] Royal Hosp Sick Children, Dept Orthopaed, Glasgow G3 8SJ, Lanark, Scotland