Perez GS, Garcia Rodriguez LA, Castellsague J, Duque OA. Hormone replacement therapy and risk of venous thromboembolism: population based case-control study. BMJ. 1997 Mar 15;314(7083):796-800.
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4
Henry D, Lim LL, Garcia Rodriguez LA, Perez GS, Carson JL, Griffin M, Savage R, Logan R, Moride Y, Hawkey C, Hill S, Fries JT. Variability in risk of gastrointestinal complications with individual non-steroidal anti-inflammatory drugs: results of a collaborative meta-analysis. BMJ. 1996 Jun 22;312(7046):1563-6.
Garcia Rodriguez LA, Perez GS, Walker AM, Lueck L. The role of non-steroidal anti-inflammatory drugs in acute liver injury. BMJ. 1992 Oct 10;305(6858):865-86.