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National Hematologic Diseases Information Service
7 Information Way
Bethesda, MD 20892–3571
The National Hematologic Diseases Information Service is an information dissemination service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). The NIDDK is part of the National Institutes of Health (NIH), one of eight health agencies of the Public Health Service, which is under the U.S. Department of Health and Human Services.
The NIDDK conducts and supports biomedical research. As a public service the NIDDK has established information services to increase knowledge and understanding about health and disease among patients, health professionals and the public.
Publications produced by the NIDDK are carefully reviewed by both NIDDK scientists and outside experts.
This publication is not copyrighted. The NIDDK encourages users of this publication to duplicate and distribute as many copies as desired.