[1] UNIV LEEDS,DEPT ANIM PHYSIOL & NUTR,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND
[2] UNIV MELBOURNE,ST VINCENTS INST MED RES,PARKVILLE,VIC 3052,AUSTRALIA
[3] UNIV MELBOURNE,DEPT VET CLIN STUDIES,PARKVILLE,VIC 3052,AUSTRALIA
[4] GENENTECH INC,SAN FRANCISCO,CA 94080