Cellular Mechanisms Involved in the Modulation of the Immune System by Drugs of Abuse; S.L. Chang, et al. Immunomodulation of Macrophage Functions by Opioids; R. Gomez-Flores, R.J. Weber. Morphine Accelerates the Progression of Sepsis in an Experimental Sepsis Model; S. Roy, et al. Morphine Depresses Macrophage Numbers and Function in Mouse Spleens; T.K. Eisenstein, et al. Morphine Depresses Macrophage Numbers and Function in Mouse Spleens; T.K. Eisenstein,...