A joint international study on the epidemiology of hypospadias.
Källén B, Bertollini R, Castilla E, Czeizel A, Knudsen LB, Martinez-Frias ML, Mastroiacovo P, Mutchinick O.
Källén B, et al. Among authors: knudsen lb.
Acta Paediatr Scand Suppl. 1986;324:1-52. doi: 10.1111/j.1651-2227.1986.tb14935.x.
Acta Paediatr Scand Suppl. 1986.
PMID: 3471045