CJCP     2002 4 (3):  245-246    ISSN: 1008-8830  CN: 43-1301/R Epidemiology of external genital organs disorders in male preschool children in Kaifeng City HE Hui-Jun, ZHANG Hui-Wen, YANG Xiao-Liu, LI Lan-Cai, Wu Sui-An, WANG Jin-Ping, WANG Feng-Mei Received: null  Revised: null  Online: null Supporting info