1. World Health Organization (1994). Indicators and Strategies for Iron Deficiency and Anemia Programmes. Report of the WHO/UNICEF/UNU Consultation. Geneva, Switzerland, 6–10 December, 1993.
2. Nutritional Assessment: A Laboratory Manual;Gibson,1993
3. Schrier S. (2007). Approach to the adult patient with anemia. UpToDate.
4. Carboxyhemoglobin levels in American blood donors;Stewart;JAMA,1974
5. Altitude above sea level as a variable for definition of anemia;Ruíz-Argüelles;Blood,2006