jiao ru ning ji shi yan jian ce ri ben xue xi chong bing kang ti de shi yan guan cha
Qiu Lishu;Xue Haichou;Zhang Yonghong;Zhu Zhenxia;Tao Yixun;Lu Shengkai;Guo Jun;Tsang VCW? Hancook KInstitute of Parasitic Diseases;China Academy of Preventive Medicine;Shanghai Medical Laboratory;3. Helminthic Diseases Branch;Division of Parasitic Diseases;Center for Infectious Diseases;CDC;U. S. A.