00476nas a2200181   4500000000100000000000100001008004100002100001700043700001600060700001500076700001400091700001600105700001400121245012600135300001200261490000700273022001400280       2019                            d1 aC. Minassian1 aR. Williams1 aW. Meeraus1 aL. Smeeth1 aO. Campbell1 aS. Thomas00aMethods to generate and validate a Pregnancy Register in the UK Clinical Practice Research Datalink primary care database  a923-9330 v28  a1053-8569