1. Policy statement: Breastfeeding and the use of human milk;American Academy of Pediatrics;Pediatrics,2005
2. Exclusive breast-feeding for at least 4 months protects against otitis media;Duncan;Pediatrics,1997
3. Maternal weight-loss patterns during prolonged lactation;Dewey;Am J Clin Nutr,1993
4. 5. Centers for Disease Control. Breastfeeding National Immunization Data: States: 2005. Accessed March 4, 2008. Available at: http://www.cdc.gov/breastfeeding/data/NIS_data/2004/socio-demographic.htm.