Plasmapheresis operations in the United States--1968.
D000574:American Medical Association; D001782:Blood Donors; D006801:Humans; D008722:Methods; D010956:Plasmapheresis / Q000009:adverse effects / Q000592:standards / Q000706:statistics & numerical data; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D014481:United States