[1] Trinity Coll Dublin, Inst Mol Med, Dublin, Ireland
[2] St James Hosp, Dept Pathol, Dublin 8, Ireland
[3] Univ Coll Dublin, Conway Inst, Dublin 2, Ireland
[4] Mater Misericordiae Univ Hosp, Dept Urol, Dublin 7, Ireland
[5] St James Hosp, Dept Urol, Dublin 8, Ireland