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Journal
- bjog: an international journal of obstetrics & gynaecology26
- bjog an international journal of obstetrics and gynaecology6
- scientific reports5
- australian new zealand journal of obstetrics gynaecology4
- bmc pregnancy and childbirth4
- plos one4
- acta obstetricia et gynecologica scandinavica3
- bmj open3
- obstetrics and gynecology3