ITGAM and acute respiratory distress syndrome: The expression of surface receptors (CD62L, CD11a, CD11b, CD18, and CD49d) was found to be roughly similar for the groups of healthy donors and patients with ARDS after incubations for 1 h and 24 h for lymphocytes and monocytes, and for 1 h and 4 h for neutrophils (Fig. 6).