Cardwell MS (2013) Stress: pregnancy considerations. Obstet Gynecol Surv 68, 119-129.
Chang HH, Warren JL, Darrow LA et al. (2015) Assessment of critical exposure and outcome windows in time-to-event analysis with application to air pollution and preterm birth study. Biostatistics 16, 509-521.
Chen XK, Wen SW, Fleming N et al. (2007) Teenage pregnancy and adverse birth outcomes: a large population based retrospective cohort study. Int J Epidemiol 36, 368-373.
Conde-Agudelo A & Diaz-Rossello JL (2014) Kangaroo mother care to reduce morbidity and mortality in low birthweight infants. Cochrane Database Syst Rev 4, CD002771.
Cormack BE & Bloomfield FH (2013) Increased protein intake decreases postnatal growth faltering in ELBW babies. Arch Dis Child Fetal Neonatal Ed 98, F399-404.
Crump C, Winkleby MA, Sundquist J et al. (2011) Preterm birth and risk of medically treated hypothyroidism in young adulthood. Clin Endocrinol (Oxf) 75, 255-260.
Crump C, Sundquist K, Sundquist J et al. (2011a) Gestational age at birth and mortality in young adulthood. JAMA 306, 1233-1240.