›› 2011, Vol. 31 ›› Issue (1): 80-.doi: 10.3969/j.issn.1674-8115.2011.01.019
• Original article (Preventive medicine) • Previous Articles Next Articles
CAI Yu-yang1, SHI Li-li2, JIANG Xue-qin1,Godfried Nortei Nortey2, Iman Sebtiu Mohammed2, MA Jin1, Pl I. Davidsen2