Patama PromsonthiDomerudee PreechapornprasertBoonsri ChanrachakulMahidol University2018-07-122018-07-122008-11-05Cochrane Database of Systematic Reviews. No.4 (2008)1469493X2-s2.0-55049137133https://repository.li.mahidol.ac.th/handle/20.500.14594/19468Mahidol UniversityMedicineNitric oxide donors for cervical ripening in first trimester for termination of pregnancyReviewSCOPUS10.1002/14651858.CD007444