| http://www.w3.org/ns/prov#value | - John R. Knight, M.D., of Harvard Medical School and Children??s Hospital Boston, and colleagues administered a substance abuse screening test consisting of six questions focused on the use of alcohol or other drugs and risky behavior to 2,133 adolescents age 12 to 18 who received outpatient medical care from March 2003 to August 2005.
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