TY - JOUR AU - Chawanpaiboon, S; Vogel, J P; Moller, A B TI - Global, regional, and national estimates of levels of preterm birth in 2014: a systematic review and modelling analysis JO - Lancet Glob Health IS - 01 VL - 7 PY - 2019 DO - 10.1016/S2214-109X(18)30451-0 L3 - PubMed-ID: 30389451 SP - e37 EP - e46 ER -