Garcia Rodriguez LA, Perez GS. Use of the UK general practice research database for pharmacoepidemiology. Br J Clin Pharmacol. 1998 May 1;45(5):419-25.
Rothman KJ, Poole C. A strengthening programme for weak associations. Int J Epidemiol. 1988 Dec 1;17(4):955-9.
Zierler S, Theodore M, Cohen A, Rothman KJ. Chemical quality of maternal drinking water and congenital heart disease. Int J Epidemiol. 1988 Sep;17(3):589-94.