TY - JOUR T1 - Hepatitis A vaccine: Is it being used to best advantage? JF - Canadian Medical Association Journal JO - CMAJ SP - 44 LP - 45 VL - 167 IS - 1 AU - David W. Scheifele AU - Jan Ochnio Y1 - 2002/07/09 UR - http://www.cmaj.ca/content/167/1/44.abstract ER -