Blood donor characteristics and the evaluation of blood donors as control subjects.
D000017:ABO Blood-Group System; D000328:Adult; D000367:Age Factors; D000368:Aged; D044383:Black People; D001782:Blood Donors; D004522:Educational Status; D005260:Female; D006760:Hospitalization; D006801:Humans; D007182:Income; D008297:Male; D008396:Maryland; D008875:Middle Aged; D009790:Occupations; D010290:Parents; D011247:Pregnancy; D044469:Racial Groups; D012067:Religion; D012737:Sex Factors; D044465:White People; D001741:Black or African American
D000017:ABO Blood-Group System