1. Hypospadias 1975 Norway 1967-1973 part of syndromes are included. The number of cases per year of hypospadias ranged from 12 in the Northern Netherlands system to
2. Bjerkedal and Bakketeig (9) nearly a thousand in England and Wales.
3. 1979 Sweden 1965-1977
4. 1982 Sweden 1965-1979
5. 1985 England and Wales 1964-1983