Nifedipine (versus unexposed)

Study	Exclusion reasons	Rmk	Reference
Bortolus, 2000	inadequate or absent control group	EXCLUDED: In the controls if the diastolic pressure exceeded 110 mmHg, nifedipine was given => 30.5 % of women in the control group received nifedipine. => No adequate control group.	Bortolus BJOG 2000; 107:792-4 10.1111/j.1471-0528.2000.tb13342.x
Parazzini, 1998	inadequate or absent control group	EXCLUDED: in the controls if the diastolic pressure exceeded 110 mmHg, nifedipine was given => 30.5 % of women in the control group received nifedipine. => No adequate control group.	Parazzini Br J Obstet Gynaecol 1998; 105:718-22 10.1111/j.1471-0528.1998.tb10201.x
Salama, 2019	other reason	EXCLUDED: Rezk 2019-Retracted article (Retraction Watch https://retractionwatch.com/) and all studies of the team are suspected 'The assessment of the work of Dr Rezk shows prima facie evidence of data fabrication.	Salama Pregnancy Hypertens 2019; 17:54-58 10.1016/j.preghy.2019.05.009