RT Journal Article SR Electronic T1 Hepatitis A vaccine: Is it being used to best advantage? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 44 OP 45 VO 167 IS 1 A1 David W. Scheifele A1 Jan Ochnio YR 2002 UL http://www.cmaj.ca/content/167/1/44.abstract