title: Letter: Prolactin levels in gynaecomastia related to Klinefelter's syndrome.
mesh_terms: D000328:Adult; D006177:Gynecomastia / Q000097:blood* / Q000209:etiology; D006801:Humans; D007713:Klinefelter Syndrome / Q000097:blood / Q000150:complications*; D008297:Male; D011388:Prolactin / Q000097:blood*; D011863:Radioimmunoassay
chemical_list: D011388:Prolactin