The limitations of some European healthcare databases for monitoring the effectiveness of pregnancy prevention programmes as risk minimisation measures

R. A. Charlton^*, V. Bettoli, H. J. Bos, A. Engeland, E. Garne, R. Gini, A. V. Hansen, L. T.W. de Jong-van den Berg, S. Jordan, K. Klungsøyr, A. J. Neville, A. Pierini, A. Puccini, M. Sinclair, D. Thayer, H. Dolk

^*Corresponding author af dette arbejde