1. Ectopic pregnancy—United States, 1988–1989;Centers for Disease Control;MMWR,1992
2. Maternal mortality surveillance, United States, 1979–1986;Koonin;MMWR CDC Surveill Summ,1991
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4. Management of unruptured ectopic gestation by linear salpingostomy: a prospective, randomized clinical trial of laparoscopy versus laparotomy;Vermesh;Obstet Gynecol,1989
5. Ectopic pregnancy, the new gynecological epidemic disease: review of the modern work-up and the nonsurgical treatment options;Maymon;Int J Fertil,1992