Gibbs RB, Nelson D, Anthony MS, Clarkson TB. Effects of long-term hormone replacement and of tibolone on choline acetyltransferase and acetylcholinesterase activities in the brains of ovariectomized, cynomologus monkeys. Neuroscience. 2002;113(4):907-14.
Willett W, Greenland S, MacMahon B, Trichopoulos D, Rothman KJ, Thomas D. The discipline of epidemiology. Science. 1995 Sep 8;269(5229):1325-6. doi: 10.1126/science.7660105
Rothman KJ. Journal policies on conflict of interest. Science. 1993 Sep 24;261(5129):1661. doi: 10.1126/science.8378766