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- australian & new zealand journal of obstetrics & gynaecology38
- bmc pregnancy & childbirth23
- paediatric & perinatal epidemiology9
- obstetrics & gynecology5
- acta obstetricia et gynecologica scandinavica4
- birth: issues in perinatal care4
- bmc health services research3
- bmc medical research methodology3
- international breastfeeding journal3