Chawanpaiboon, S. et al. Global, regional, and National estimates of levels of preterm birth in 2014: a systematic review and modelling analysis. Lancet Glob Health. 7, e37–e46. https://doi.org/10.1016/s2214-109x(18)30451-0 (2019).
Chawanpaiboon, S. et al. Global, regional, and National estimates of levels of preterm birth in 2014: a systematic review and modelling analysis. Lancet Glob Health. 7, e37–e46. https://doi.org/10.1016/s2214-109x(18)30451-0 (2019).