7Brown M M, Brown G C, Sharma S, et al. Physician manpower and health care expenditures in the United States: a thirty-year perspective[J]. J Health Care Finance, 2001, 27(4): 55-64.
8Phillips R L, Dodoo M, Jaen C R, et al. COGME's 16th report to congress: Too many physicians could be worse than wasted[J]. Annals of Family Medicine, 2005, 3(3): 268-270.
