1. Sickle Cell Branch; National Heart, Lung and Blood Institute; The National Institutes of Health; Bethesda Maryland
2. Royal Sussex County Hospital; Brighton UK
3. Lipoprotein Metabolism Section; Cardiovascular-Pulmonary Branch, National Heart, Lung and Blood Institutes of Heath; National Institutes of Health; Bethesda Maryland
4. Department of Laboratory Medicine; The National Institutes of Health; Bethesda Maryland