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QLS front-line retention manual: methods for achieving a 94% cohort retention rate in longitudinal research

McLaughlin, Patricia; White, Nick; King, Kate; Hann, Robert G.; Williams, Robert J.; Schopflocher, Donald Peter; West, Beverly L.; Flexhaug, Trevor (Ontario Problem Gambling Research Centre, 2014)
Quinte longitudinal study of gambling and problem gambling

Williams, Robert J.; Hann, Robert G.; Schopflocher, Donald Peter; West, Beverly L.; McLaughlin, Patricia; White, Nick; King, Kate; Flexhaug, Trevor (Ontario Problem Gambling Research Centre, 2015)