R. Bell, M. Banker, R. Rhodes, T. Biester and F. Lewis, “Graduate Medical Education in Surgery in the United States,” Surgical Clinics of North America, Vol. 87, No. 4, 2007, pp. 811-823. doi:10.1016/j.suc.2007.06.005
 R. P. McAlister, D. A. Andriole, S. E. Brotherton and D. B. Jeffe, “Attrition in Residents Entering U.S. Obstetrics and Gynecology Residencies: Analysis of GME Census Data,” American Journal of Obstetrics and Gynecology, Vol. 199, No. 5, 2008, pp. 574e1-574e6.
 W. Longo, J. Seashore, A. Duffy and R. Udelsman, “Attrition of Categoric General Surgery Residents: Results of a 20-Year Audit,” The American Journal of Surgery, Vol. 197, No. 6, 2009, pp. 774-778. doi:10.1016/j.amjsurg.2008.06.038
 D. C. Lynge, E. H. Larson, M. J. Thompson, R. A. Rosenblatt and L. G. Hart, “A Longitudinal Analysis of the General Surgery Workforce in the United States 1981-2005,” Archives of Surgery, Vol. 143, No. 4, 2008, pp. 345-350. doi:10.1001/archsurg.143.4.345
 C. B. Everett, S. D. Helmer, J. S. Osland and R. S. Smith, “General Surgery Resident Attrition and the 80-Hour Workweek,” The American Journal of Surgery, Vol. 194, No. 6, 2007, pp. 751-757. doi:10.1016/j.amjsurg.2007.08.033
 T. J. Leibrandt, C. M. Pezzi, S. A. Fassler, E. F. Reilly and J. B. Morris, “Has the 80-Hour Work Week Had an Impact on Voluntary Attrition in General Surgery Residency Programs?” Journal of The American College of Surgeons, Vol. 202, No. 2, 2006, pp. 340-344. doi:10.1016/j.jamcollsurg.2005.09.018
 H. Yeo, et al., “Attitudes, Training Experiences, and Professional Expectations of US General Surgery Residents,” Journal of the American Medical Association, Vol. 302, No. 12, 2009, pp. 1301-1308. doi:10.1001/jama.2009.1386
 B. McKinstry, M. Porter, R. Wrate, R. Elton and J. Shaw, “The MAGPI (Morale Assessment in General Practice Index): A New Way for Doctors to Self-Assess Their Morale,” Education for Primary Care, Vol. 15, No. 2, 2004, pp. 231-241.