%0 Journal Article %K Electronic Health Data %K Pregnancy %K primary care %B Pharmacoepidemiol Drug Saf %D 2022 %G eng %M 36522838 %R 10.1002/pds.5584 %T Methods to refine and extend a Pregnancy Register in the UK Clinical Practice Research Datalink primary care databases %7 2022/12/17 %@ 1053-8569