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BMC Medicine > 2018 > 16 > 1 > 1-14
Maternal and Child Health Journal > 2016 > 20 > 8 > 1696-1703
Archives of Gynecology and Obstetrics > 2014 > 289 > 6 > 1203-1206
Archives of Gynecology and Obstetrics > 2012 > 285 > 5 > 1211-1218