[1] Western Gen Hosp, Dept Pathol, Edinburgh EH4 2XU, Midlothian, Scotland
[2] Raigmore Hosp, Dept Pathol, Inverness, Scotland
[3] Western Gen Hosp, Mol Diagnost Lab, Dept Haematol, Edinburgh EH4 2XU, Midlothian, Scotland
[4] Western Gen Hosp, SE Scotland Cytogenet Lab, Edinburgh EH4 2XU, Midlothian, Scotland
[5] Ninewells Hosp, Human Genet Unit, Dundee DD1 9SY, Scotland
[6] Aberdeen Royal Infirm, Dept Cytogenet, Aberdeen, Scotland