References
- ROOS, L. L., MUSTARD, C. A., NICOL, J. P., MCLERRAN, D. F., MALENKA, D. J., YOUNG, K. and COHEN,M. M., 1993, Register and administrative data: organization and accuracy. Medical Care, 31, 201– 212.
- ROOS, L. L., WALLD, R.,WAJDA, A., BOND, R. and HARTFORD, K., 1996, Record linkage strategies, outpatient procedures, and administrative data. Medical Care, 34, 570– 582.
- GISSLER, M., HEMMINKI, E., LOUHIALA, P. and JA¨ RVELIN, M.-R., 1998, Health registers as a feasible means of measuring health status in childhood – a 7-year follow-up of the 1987 Finnish birth cohort. Paediatric & Perinatal Epidemiology, 12, 437– 455.
- GISSLER, M., 1999, Administrative registers in health research. A cohort study of Finnish children born in 1987, Research Report 97 (Helsinki; STAKES).
- HEMMINKI, E., 2002, When research knowledge is unwelcomed: studying the health effects of in vitro fertilization. Journal of Health Services & Research Policy, 7, 4–9.
- GISSLER, M. and TIITINEN, A., 1999, Finnish IVF-statistics 1992 – 1998, Statistical report 30/ 1999:10 (Helsinki: STAKES).
- GISSLER, M., MALIN, M., SILVERIO, M. and HEMMINKI, E., 1995, In vitro fertilization pregnancies and perinatal health in Finland 1991 – 1993. Human Reproduction, 10, 1856– 1861.
- Guidelines for ATC classification and DDD assignment, Oslo: WHO Collaborating Centre for Drug Statistics Methodology, 1996.