[1] UNIV WESTERN ONTARIO,DEPT MICROBIOL & IMMUNOL,LONDON,ON N6A 5C1,CANADA
[2] TURKU CTR BIOTECHNOL,TURKU 20521,FINLAND
[3] UNIV GUELPH,DEPT MICROBIOL,GUELPH,ON N1G 2W1,CANADA
[4] OHIO STATE UNIV,DEPT PLANT PATHOL,COLUMBUS,OH 43210
[5] NAGOYA UNIV,SCH INFORMAT & SCI,NAGOYA,AICHI 46401,JAPAN
[6] UNIV CANTERBURY,DEPT PLANT & MICROBIAL SCI,CHRISTCHURCH 4,NEW ZEALAND
[7] UNIV CAMBRIDGE,DEPT CLIN VET MED,CAMBRIDGE CB3 0ES,ENGLAND
[8] DUKE UNIV,MED CTR,DEPT BIOCHEM,DURHAM,NC 27710
[9] UNIFORMED SERV UNIV HLTH SCI,DEPT MICROBIOL & IMMUNOL,BETHESDA,MD 20814