Selection bias in general practice research : analysis in a cohort of pregnant Danish women
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Ertmann , R K , Nicolaisdottir , D R , Kragstrup , J , Siersma , V , Overbeck , G , Wilson , P & Lutterodt , M C 2020 , ' Selection bias in general practice research : analysis in a cohort of pregnant Danish women ' , Scandinavian Journal of Primary Health Care , vol. 38 , no. 4 , pp. 464-472 . https://doi.org/10.1080/02813432.2020.1847827
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