Open randomised trial of the (Arabin) pessary to prevent preterm birth in twin pregnancy with health economics and acceptability : STOPPIT-2-a study protocol
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Norman , J E , Norrie , J , Maclennan , G , Cooper , D , Whyte , S , Burley , S C , Smith , J B E , Shennan , A , Robson , S C , Thornton , S , Kilby , M D , Marlow , N , Stock , S J , Bennett , P R & Denton , J 2019 , ' Open randomised trial of the (Arabin) pessary to prevent preterm birth in twin pregnancy with health economics and acceptability : STOPPIT-2-a study protocol ' , BMJ Open , vol. 8 , no. 12 , e026430 . https://doi.org/10.1136/bmjopen-2018-026430
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