title: Letter: Distinguishing T and B lymphocytes by light microscopy and Normarski optics.
mesh_terms: D001402:B-Lymphocytes / Q000166:cytology*; D001800:Blood Specimen Collection; D006801:Humans; D008853:Microscopy; D008855:Microscopy, Electron, Scanning; D055095:Optics and Photonics; D013601:T-Lymphocytes / Q000166:cytology*