2Gortmaker S L,Walker D K,Weitzman M,et al. Chronic conditions, socioeconomic risks, and behavioral problems in children and adolescents [J]. Pediatrics,1990,85(3) :267. 被引量:1
21,Gortmaker SL,Walker DK, Weitzman M, et al. Chronic conditions,socioeconomic risks, and be-havioral problems in children and adolescents[J].Pediatrics,1990,85:267 被引量:1