CJCP     2007 9 (4):  383-384    ISSN: 1008-8830  CN: 43-1301/R Investigation on birth defects in 8285 perinatal infants PENG Xiao-Lin Qidong Maternal and Child Health Care Hospital, Qidong, Hunan 421600, China. Received: null  Revised: null  Online: null Supporting info