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American Journal of Obstetrics and Gynecology > 2010 > 203 > 6 > 552.e1-552.e6
Transactions of the Royal Society of Tropical Medicine and Hygiene > 2001 > 95 > 4 > 424-428
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1996 > 90 > 3 > 302-304
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1995 > 89 > 6 > 672-676
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1995 > 89 > 6 > 654-656