TY - GEN AU - Alijahan,Rahele AU - Hazrati,Sadegh AU - Mirzarahimi,Mehrdad AU - Pourfarzi,Farhad AU - Ahmadi Hadi,Peymaneh TI - Prevalence and risk factors associated with preterm birth in Ardabil, Iran SN - 1680-6433 PY - 2014///0506 N1 - Publication Type: Journal Article ER -