Weiser T., Regenbogen S., Thompson K., et al. An estimation of the global volume of surgery: a modelling strategy based on available data. The Lancet Global Health. 2008; 372: 139–44.

Mihaolain A., Butler J., Wood A., et al. The increased need for liaison psychiatry in surgical patients due to the high prevalence of undiagnosed anxiety and depression. Irish Journal of Medicine Science. 2008; 177(3): 211–5.

Kudoh A., Katagai H., Takazawa T. Antidepressant treatment for chronic depressed patients should not be discontinued prior to anesthesia. Canadian Journal of Anesthesia. 2002; 49: 132–6.

Practice ACoO ACOG Committee Opinion No. 474: nonobstetric surgery during pregnancy. Obstet Gynecol. 2011; 117: 420–421.

Pearl J., Price R., Richardson W., Fanelli R. Society of American Gastrointestinal Endoscopic S (2011) Guidelines for diagnosis, treatment, and use of laparoscopy for surgical problems during pregnancy. Surg Endosc. 25: 3479–3492.

de Bari O., Wang TY., Liu M., Paik CN., Portincasa P., Wang DQ. Cholesterol cholelithiasis in pregnant women: pathogenesis, prevention and treatment. Ann Hepatol. 2014; 13(6): 728–45.

Barkun AN, Bardou M, Pham CQ, Martel M. Proton pump inhibitors vs histamine 2 receptor antagonists for stress-related mucosal bleeding prophylaxis in critically ill patients: a meta-analysis. Am J Gastroenterol 2012; 107: 507–520.

Alhazzani W, Alenezi F, Jaeschke RZ, Moayyedi P, Cook DJ. Proton pump inhibitors versus histamine 2 receptor antagonists for stress ulcer prophylaxis in critically ill patients: a systematic review and meta-analysis. Crit Care Med 2013; 41: 693–705.

Dellinger RP, Levy MM, Rhodes A, et al. Surviving Sepsis Campaign Guidelines Committee including the Pediatric Subgroup. Surviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. Crit Care Med 2013; 41: 58