False low serum vitamin B12 values with radiodilution assays using blocked R-binders.
D000328:Adult; D000368:Aged; D000752:Anemia, Pernicious / Q000097:blood; D001798:Blood Proteins; D004909:Erythrocyte Indices; D005188:False Negative Reactions; D005260:Female; D005494:Folic Acid Deficiency / Q000097:blood; D006801:Humans; D008297:Male; D008875:Middle Aged; D011865:Radioisotope Dilution Technique; D014155:Transcobalamins; D014805:Vitamin B 12 / Q000097:blood*
D001798:Blood Proteins; D014155:Transcobalamins; D014805:Vitamin B 12