5Dongming Cui, et al. High-level Dietary Vitamin A Enhances T- Helper Type 2 Cytokine Production and Secretory Immunoglobulin A Response to Influenza Virus Infection in BALB/C Mice. J Nutr, 2000, 130:1132 - 1139.
6Boon P Chen, et al. Dietary 3 - Carotene Stimulates Cell - Medi-ated and Humoral Immune Responee in Dogs. J Nutr, 2000,130:1910 - 1913.
7Takeshi Nikawa, Kenji Odahara. Vitamin Prevents the Decline in Immunoglobulin A and Th2 Cytokine Levels in Small Intestinal Mucosa of Protion-Malnourished Mice. J Nutr, 1999, 129:934 - 941.
8Harry D, Dawson, Nan- Qian Li. Chronic Marginal Vitamin A Status Reduce Natural Killer Cell Number and Function in Aging Lewis Rats. J Nutr, 1999, 129:1510 - 1517.
9Groe A B, Qureshi M A. Enhancement of Humoral and Celluar Immunity by Vitamin E After Embryonic Exposure. Poultry Science, 1997, 76(7): 984 - 991.
