CJCP     2011 13 (4):  296-299    ISSN: 1008-8830  CN: 43-1301/R Selective screening of inborn errors of metabolism by using the tandem mass spectrometry: pilot study of 552 children at high risk LOU Yan, YIN Na, CHEN Feng-Qin, CHENG Ya-Ying, XU Li-Jin, DAI Fang, SONG Xiao-Tao Department of Pediatrics, Hebei Provincial Hospital, Shijiazhuang, Hebei 050051, China. Email: louyanchina@yahoo.com.cn Received: null  Revised: null  Online: null Supporting info