Lippincott, Williams & Wilkins, Obstetrics & Gynecology, 5(97), p. 734-741, 2001
DOI: 10.1097/00006250-200105000-00018
Lippincott, Williams & Wilkins, Obstetrics & Gynecology, 5(97), p. 734-741, 2001
DOI: 10.1016/s0029-7844(01)01189-9
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