5PolandStelmach 1, Podsiadlowicz - Borzecka M, Juralowiez D. Analysis of possible causes of recurrent respiratory tract infections in children from Lodz [ J ]. Pneumonologia i Alergologia Polska, 2003, 71 (5 -6): 237 -244.
6Ozkan H, Atlihan F, Genel F, et al. IgA and/or IgG subclass deficiency inchildren with recurrent respiratory infections and its relationship with chronicpulmonary damage [ J]. Journal of Investigational Allergology & Clinical Immunology. 2005, 15 (1): 69-74.
7Rossi ME, MarranciS, DeMarcoA, etal. Reduced natural killer function inchildren with recurrent respiratory tract infections [ J]. Pediatria Medica e Chirurgica. 1993, 15 (1) : 1 -4.
8Andrea A, Aste-Amezaga M, Valiante NM, et al. Interleukin 10(IL-10) inhibits human lymphocyte interferon-production by suppressing natural killer cell stimulatory factor/IL-12 synthesis in accessory cells[J] .J Exp Med, 1993, 178:1041.
9Blanco. A, Gonzalez H, Arranz E, et al. Decreases interleukin-12levels in umbilical cord blood in children who developed acute bronchiolitis[J]. Pediatr Pulmonol, 1999,28(3): 175-180.
10Chan SH, Kobayashi M, Santoli D, et al. Mechanisms of IFN-γinduction by natural killer cell stimulatory factor(NKSF/IL-12)[J] .J Immunol, 1992, 148(1) :92-98.