Links[1] https://www.uoguelph.ca/hhns/system/files/Masters Coursework Positions.pdf [2] https://www.linkedin.com/in/john-zettel-37849a2a/?originalSubdomain=ca [3] https://scholar.google.ca/citations?user=iuvh77IAAAAJ&hl=en [4] https://www.researchgate.net/profile/John-Zettel