Irradiated animals and 4F administration. Effect of 4F administration on (A) neutrophils (ANC), (B) platelets (PLT), (C) lymphocytes, and (D) hemoglobin in 5 Gy total body ⁶⁰Co gamma irradiated animals. Animals were given a single intravenous injection of 4F combination (50 μg/kg of each cytokine, n = 4) or saline diluent (n = 4). The data represent mean values ± SD. For better visualization, values of hematologic parameters are not represented from D90 to D260.