National Blood Resource Education Program (U.S.). "Infoline"(Journal, magazine). Government Publication. U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health. OCLC18718682. Retrieved February 15, 2014.
National Blood Resource Education Program (U.S.). "Infoline"(Journal, magazine). Government Publication. U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health. OCLC18718682. Retrieved February 15, 2014.