CJCP     2002 4 (3):  167-170    ISSN: 1008-8830  CN: 43-1301/R Chaotic Characteristics and Power Spectrum Characteristics of Heart Period Signals in Children with Asthma WEI Yu-Shu, PI Guang-Huan, GU Zhi-Yong, XIE Zheng-Xiang, XU Xiao-Hong Department of Pediatrics, Affiliated Hospital of North Sichuan Medical College,Nanchong,Sichuan 637007, China Received: null  Revised: null  Online: null Supporting info