Rothman KJ, Evans S. More on JAMA's policy on industry sponsored studies. BMJ. 2006 Feb 25;332(7539):489.
Roland M, Campbell S, Baliey N, Whalley D, Sibbald B. Financial incentives to improve the quality of primary care in the UK: predicting the consequences of change. Prim Health Care Res Dev. 2006 Jan 1;7(1):18-26.