6Phillips N C,Tsoukas C. Liposomal encapsulation of azidothy- midine results in decreased hematopoietic toxicity and enhanced activity against murine acquired immunodeficiency syndrome[J]. Blood, 1992,79(5) : 1137-1143.
7Sztein M B,Serrate S A. Characterization of the immunoregu-latory properties of thymosin alpha 1 on interleukin-2 produc- tion and interleukin-2 receptor expression in normal human lymphocytes [J]. International Journal of Immnnopharmacology, 1989,11 (7) :789-800.
8King D J. Selection of thermostable Newcastle disease virus progeny from reference and vaccine strains[J]. Avian Diseases, 2001,45(2) :512-516.
9Kapczynski D R,Tumpey T M. Development of a virosome vaccine for Newcastle disease virus[J]. Avian Diseases,2003,47 (3) :578-587.
10Isaacs A,Lindenmann J. Virus interference. I. The interferon [J]. Proceedings of the Royal Society of London Series B: Bio- logical Sciences, 1957,147(927) :258-267.