Targeting multiple health risk behaviours among vocational education students using electronic feedback and online and telephone support: protocol for a cluster randomised trial

- Tzelepis, Flora; Paul, Christine L.; Campbell, Elizabeth; Courtney, Ryan J.; Chapman, Kathy; Wolfenden, Luke; Guillaumier, Ashleigh; Searles, Andrew; Wiggers, John; Kypri, Kypros; Bonevski, Billie; McElduff, Patrick; Hill, Mary Ann; Morgan, Philip J; Lynagh, Marita; Collins, Clare E.