title: Lack of suppressor T cells in renal transplant recipients and activation by aminophylline.
mesh_terms: D000628:Aminophylline / Q000627:therapeutic use*; D003404:Creatinine / Q000097:blood; D006084:Graft Rejection / Q000187:drug effects; D006801:Humans; D016030:Kidney Transplantation; D007958:Leukocyte Count; D008213:Lymphocyte Activation / Q000187:drug effects*; D013601:T-Lymphocytes; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D000628:Aminophylline; D003404:Creatinine