[1] Univ Porto, Dept Genet, Fac Med, P-4200319 Oporto, Portugal
[2] Hosp Geral Sto Antonio, Dept Urol, Oporto, Portugal
[3] Ctr Reprod Genet Alberto Barros, Oporto, Portugal
[4] Univ Porto, Cell Biol Lab, Inst Biomed Sci Abel Salazar, ICBAS,UMIB, P-4200319 Oporto, Portugal