1. Cholecystectomy during pregnancy without fetal loss;McKellar;Surg Gynecol Obstet,1992
2. Cholecystectomy during pregnancy;Printen;Am J Surg,1978
3. Appendicitis in pregnancy;Weingold;Clin Obstet Gynecol,1983
4. Cholecystectomy in pregnancy;Hill;Obstet Gynecol,1975
5. Laparoscopic cholecystectomy in pregnancy;Gouldman;Am Surg,1998