TY - RPRT TI - Age-associated decrease in proportion and antigen expression of CD8+/CD4+ thymocytes in BALB/c mice. AU - M el Demellawy AU - R el Ridi PY - 1992 DO - 10.1016/0047-6374(92)90115-t UR - https://pubmed.ncbi.nlm.nih.gov/1349934/ ID - 1349934 ER -