RT Journal Article SR Electronic T1 Comparison of Radiometric Microbiologic Assay and Competitive Protein Binding Radioassay for Plasma and Red Blood Cell Folate Levels JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 119 OP 122 VO 11 IS 3 A1 Garrison, Grace M. A1 Engin, I. Semra A1 Waud, John M. A1 Drew, Helen A1 Kasecamp, Barbara J. YR 1983 UL http://tech.snmjournals.org/content/11/3/119.abstract AB We compared the radiometric microbiologic assay with a commercially available competitive protein binding radioassay kit for plasma and red blood cell folate. The correlation coefficient between these two assays was r = 0.78 for plasma folate and r = 0.87 for red blood cell folate. The sensitivity of the radiometric microbiologic assay was 96% for red blood cell folate.