title: Letter: Radioimmunoassay of PGE and PGF alpha in human plasma: very low levels.
mesh_terms: D000328:Adult; D000367:Age Factors; D001800:Blood Specimen Collection; D002845:Chromatography; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D011453:Prostaglandins / Q000097:blood*; D011863:Radioimmunoassay
chemical_list: D011453:Prostaglandins