1. Ader, R., D. Felten and R. Cohen, 1990, Interactions between the brain and the immune system, Annu. Rev. Pharmacol. Toxicol. 30, 561.
2. Alito, A., H.E. Romeo, R. Baler, H.E. Chuluyan, M. Braun and D.P. Cardinali, 1987, Autonomic nervous system regulation of murine responses as assessed by local sympathetic and parasympathetic denervation, Acta Physiol. Pharmacol. Latinoam. 37, 305.
3. Angeli, A., A.G. Masera, A.H. Ataureghi, M.L. Sartori and L. Maina, 1994, Circadian rhythms and multihormonal control of human NK activity. Relevance to immunotherapy of cancer, in: Advances in Pineal Research: 7, eds. G.J.M. Maestroni, A. Conti and R.J. Reiter (Libbey, London) p. 269.
4. Appenzeller, O., 1990, The Autonomic Nervous System (Elsevier, Amsterdam).
5. Barontini, M., H.E. Romeo, I. Armando and D.P. Cardinali, 1988, 24-h changes in catecholamine content in rat thyroid and submaxillary glands, J. Neural Transm. 71, 189.