RT Journal Article SR Electronic T1 New strains of norovirus and the mystery of viral gastroenteritis epidemics JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1381 OP 1382 DO 10.1503/cmaj.130426 VO 185 IS 16 A1 Bonita E. Lee A1 Xiao-Li Pang YR 2013 UL http://www.cmaj.ca/content/185/16/1381.abstract AB