1. Global, regional, and national estimates of levels of preterm birth in 2014: a systematic review and modelling analysis 
Saifon Chawanpaiboon, MD, Joshua P Vogel, PhD, Ann-Beth Moller, MPH, Prof Pisake Lumbiganon, MD, Prof Max Petzold, PhD, Daniel Hogan, PhD, Sihem Landoulsi, MSc, Nampet Jampathong, MPH, Kiattisak Kongwattanakul, MD, Prof Malinee Laopaiboon, PhD, Cameron Lewis, MBBS, Siwanon Rattanakanokchai, MPH, Ditza N Teng, MBBS, Prof Jadsada Thinkhamrop, MD, Kanokwaroon Watananirun, MD, Prof Jun Zhang, PhD, Wei Zhou, MD, A Metin Gülmezoglu, PhD 
The Lancet Global Health 
Volume 7, Issue 1, Pages e37-e46 (January 2019)
DOI: /S X(18)
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2. Figure 1 Estimated preterm birth rates in 2014
The Lancet Global Health 2019 7, e37-e46DOI: ( /S X(18) )
Copyright © 2019 World Health Organization Terms and Conditions

3. Figure 2 Estimated numbers of preterm births in 2014
The Lancet Global Health 2019 7, e37-e46DOI: ( /S X(18) )
Copyright © 2019 World Health Organization Terms and Conditions