TY - JOUR T1 - Preterm birth: temporal trends and socioeconomic inequalities JO - Jornal de Pediatria T2 - AU - Yang,Seungmi AU - Kramer,Michael S. SN - 22555536 M3 - 10.1016/j.jpedp.2017.08.014 DO - 10.1016/j.jpedp.2017.08.014 UR - https://jped.elsevier.es/pt-preterm-birth-temporal-trends-socioeconomic-articulo-S2255553617301027 ER -