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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Epidemiology. 2011 May;22(3):320–327. doi: 10.1097/EDE.0b013e31821266c5

Figure 1.

Figure 1

The relation between gestational age at birth, mortality, and Factors 1 (or 3) and Factor 2. Arrows represent the gestational age by which approximately 99% of babies affected by that factor (or with no factor) have been born.