作者单位:Weill Cornell Med Coll, Dept Pathol & Lab Med, New York, NY 10065 USA[1]NewYork Presbyterian Weill Cornell Med Ctr, New York, NY USA[2]Univ Tennessee, Coll Vet Med, Dept Biomed & Diagnost Sci, Knoxville, TN 37996 USA[3]Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843 USA[4]