[1] UNIV CALIF SAN FRANCISCO,MED CTR,DEPT MICROBIOL & IMMUNOL,SAN FRANCISCO,CA 94143
[2] UNIV CALIF SAN FRANCISCO,MED CTR,GW HOOPER RES FDN,SAN FRANCISCO,CA 94143
[3] UNIV CALIF DAVIS,DEPT BACTERIOL,DAVIS,CA 95616
[4] LUDWIG INST CANC RES,MRC LAB,CAMBRIDGE CB2 2Q11,ENGLAND