15西班牙和丹麦受感染猪场的猪个体感染断奶后多系统衰竭综合征的风险因素Grau-Roma L,Stockmarr A,Kristensen CS,Enφe C,L ó pez-Soria S,Nofrar í as M,Bille-Hansen V,Hjulsager CK,Sibila M,陶莉“猪Ⅱ型圆环病毒”专栏27-28