1. Preterm birth: a puzzle worth solving.;JC Morrison;Obstet Gynecol,1990
2. Mothers, babies and health in later life.;DJP Barker,1998
3. Psychomotor and intellectual development (Neurocognitive Function) of children born small for gestational age (SGA). Transversal and longitudinal study.;B Puga;Pediatr Endocrinol Rev,2009
4. Annual summary of vital statistics: 2008.;TJ Mathews;Pediatrics,2011
5. Socioeconomic status and perinatal outcomes in a setting with universal access to essential health care services.;KS Joseph;CMAJ,2007