TY - STAND AU - C. Minassian AU - R. Williams AU - W. Meeraus AU - L. Smeeth AU - O. Campbell AU - S. Thomas BT - Pharmacoepidemiol Drug Saf DO - 10.1002/pds.4811 M1 - 7 PY - 2019 SP - 923 EP - 933 T2 - Pharmacoepidemiol Drug Saf TI - Methods to generate and validate a Pregnancy Register in the UK Clinical Practice Research Datalink primary care database VL - 28 SN - 1053-8569 ER -