Preferences for chemotherapy in patients with advanced non-small cell lung cancer: descriptive study based on scripted interviewsGerard A. Silvestri, H. Gilbert Welch, Robert S. Pritchard|BMJ|1998Cited by 434
A Comparison of the Educational Costs and Incomes of Physicians and Other ProfessionalsWilliam B. Weeks, H. Gilbert Welch, Amy E. Wallace et al.|New England Journal of Medicine|1994Cited by 95