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De Vries, Raymond G...
Meertens , L J E , Scheepers , H C J , De Vries , R G , Dirksen , C D , Korstjens , I , Mulder , A L M , Nieuwenhuijze , M J , Nijhuis , J G , Spaanderman , M E A & Smits , L J M 2017 , ' External Validation Study of First Trimester Obstetric Prediction Models (Expect Study I) : Research Protocol and Population Characteristics ' , JMIR Research Protocols , vol. 6 , no. 10 , 203 . https://doi.org/10.2196/resprot.7837.
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2017