The influence of warning messages on the public's perception of substance use: A theoretical framework. - Dave Gelders; René Patesson; Sofie Vandoninck; Pascale Steinberg; Sara Van Malderen; Pablo Nicaise; Brice De Ruyver; Isidore Pelc; Mohan Jyoti Dutta; Keith Roe; Freya Vander Laenen (Gov. Inf. Q., 2009)