CJCP     2004 6 (1):  38-41    ISSN: 1008-8830  CN: 43-1301/R Model of spina bif ida occulta induced by valproic acid in foetal rats LI Yong, WANG Wei-Lin, YUAN Zheng-Wei, BAI Yu-Zuo, YANG Yi, CA Wei-Song Department of Pediatric Surgery , Second Clinical Hospital , China Medical University , Shengyang 110004 , China Received: null  Revised: null  Online: null Supporting info