RT Journal Article SR Electronic T1 Introducing the National Collaborating Centres for Public Health JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 493 OP 493 DO 10.1503/cmaj.060850 VO 175 IS 5 A1 Barbara Medlar A1 David Mowat A1 Erica Di Ruggiero A1 John Frank YR 2006 UL http://www.cmaj.ca/content/175/5/493.abstract