4. Data sets analysed

1994, Collaborative overview of randomised trials of antiplatelet therapy — I: Prevention of death, myocardial infarction, and stroke by prolonged antiplatelet therapy in various categories of patients, Br. Med. J., 308, 81, 10.1136/bmj.308.6921.81 Bertrand-Hardy, 1995, European Stroke Prevention Study 2: Baseline data, J. Neurol. Sci., 131, 1, 10.1016/0022-510X(95)90026-M Müller, 1990, Dipyridamole alone or combined with low-dose acetylsalicylic acid inhibits platelet aggregation in human whole blood ex vivo, Br. J. Clin. Pharmacol., 30, 179, 10.1111/j.1365-2125.1990.tb03763.x Yusuf, 1991, Analysis and interpretation of treatment effects in subgroups of patients in randomized clinical trials, J. Am. Med. Assoc., 266, 93, 10.1001/jama.266.1.93