1. World Health Organization (1997) WHO Scientific Group Meeting on Cardiovascular Disease and Steroid Hormone Contraceptives. Summary of Conclusions. Weekly Epidemiological Record 48: 361–363
2. Diczfalusy E (1997) The contraceptive revolution. Parthenon Publishing, New York
3. World Health Organization (1997) Progress in human reproduction research. WHO Progress 42
4. Jordan WM (1961) Pulmonary embolism (letter). Lancet 2ii: 1146–1147
5. Lorentz IT (1962) Parietal lesion and“Enavid” (letter). BMJ 2: 1191