[1] CTR DIS CONTROL,CTR INFECT DIS,DIV VIRAL & RICKETTSIAL DIS,MAILSTOP G-18,1600 CLIFTON RD,ATLANTA,GA 30333
[2] CTR DIS CONTROL,CTR PREVENT SERV,DIV SEXUALLY TRANSMITTED DIS & HIV PREVENT,ATLANTA,GA 30333
[3] BIOKIT SA,DEPT MOLEC BIOL,BARCELONA,SPAIN
[4] UNIV ALABAMA,DEPT PEDIAT & MICROBIOL,BIRMINGHAM,AL 35294