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Journal of Substance Abuse|February 26, 2000
Simultaneous polydrug use among teens: prevalence and predictorsR L Collins, P L Ellickson, R M Bell
Journal of Behavioral Medicine|October 1, 1989
Does pooling saliva for cotinine testing save money without losing information?R M Bell, P L Ellickson
Science (New York, N.Y.)|March 16, 1990
Drug prevention in junior high: a multi-site longitudinal testP L Ellickson, R M Bell
American Journal of Public Health|June 1, 1993
Preventing adolescent drug use: long-term results of a junior high programP L Ellickson, R M Bell, K McGuigan
Journal of Abnormal Psychology|August 1, 1992
Stepping through the drug use sequence: longitudinal scalogram analysis of initiation and regular useP L Ellickson, R D Hays, R M Bell
Preventive Medicine|July 1, 1993
Do drug prevention effects persist into high school? How project ALERT did with ninth gradersR M Bell, P L Ellickson, E R Harrison
Health Education Quarterly|January 1, 1993
Changing adolescent propensities to use drugs: results from Project ALERTP L Ellickson, R M Bell, E R Harrison
Evaluation Review|September 30, 2000
Effects of incentive size and timing on response rates to a follow-up wave of a longitudinal mailed surveyR L Collins, P L Ellickson, R D Hays, et al.
Addiction (Abingdon, England)|October 1, 1996
Teenagers and alcohol misuse in the United States: by any definition, it's a big problemP L Ellickson, K A McGuigan, V Adams, et al.
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