REFERENCES
- Hampton N. The role of hormonal contraceptives in acne. Br J Sex Med 1995; May/June: 11–14
- Stathakis V, Kilkenny M, Marks R. Descriptive epide- miology of acne vulgaris in the community. Australas J Dermatol 1997;38:115–23
- Hall G. Pharmacoepidemiology using a UK database of primary care records. Pharmacoepidemiol Drug Saf 1992; 1:33–7
- Lis Y, Mann RD. The VAMP research multi-purpose database in the UK. J Clin Epidemiol 1995;48:431–43
- Mann RD, Hall G, Chukwujindu J. Research implica- tions of computerised primary care. Postmarketing Surveillance 1992;5:259–68
- Hollowell J. General Practice Research Database (GPRD): Scope and Quality of Data. London: Office of Population Censuses and Surveys, 1994
- Anonymous. The General Practice Research Database: Information for Researchers. London: Office for National Statistics, 1996
- Walley T, Mantgani A. The UK general practice research database. Lancet 1997;350:1097–9
- Jick H, Jick SS, Derby LE. Validation of information recorded on general practitioner based computerised data resource in the United Kingdom. Br Med J 1991; 302:766–8
- Jick H, Terris BZ, Derby LE, Jick SS. Further validation of information recorded on a general practitioner based computerised data resource in the United Kingdom. Pharmacoepidemiol Drug Saf 1992;1:347–9
- Nazareth I, King M, Haines A, Rangel L, Myers S. Accuracy of diagnosis of psychosis on general practice computer system. Br Med J 1993;307:32–4
- Van Staa TP, Abenhaim L. The quality of information recorded on a UK database of primary care records: a study of hospitalization due to hypoglycaemia and other conditions. Pharmacoepidemiol Drug Saf 1994;3:15–21
- Rowlands S, Devalia H, Lawrenson R. Repeated use of hormonal emergency contraception by younger women in the UK. Br J Fam Plann 2000;26:138–43
- Todd J-C, Lawrenson R, Farmer RDT, Williams TJ, Leydon GM. Venous thromboembolic disease and combined oral contraceptives: a re-analysis of the MediPlus database. Hum Reprod 1999;14:1500–5