TY - JOUR AU - Heinemann, J; Gillen, G; Sanchez-Ramos, I TI - Do mechanical methods of cervical ripening increase infectious morbidity? A systematic review JO - AJOG VL - 199 PY - 2008 DO - 10.1016/j.ajog.2008.05.005 L3 - PubMed-ID: 18674661 SP - 177 EP - 187 ER -