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HM, Colón, Pérez CM, Meléndez M, Marrero E, Ortiz AP, and Suárez E. The Validity of Drug Use Responses in a Household Survey in Puerto Rico: Comparison of Survey Responses With Urinalysis. 2010.

HM, Colón, et al. The Validity of Drug Use Responses in a Household Survey in Puerto Rico: Comparison of Survey Responses With Urinalysis. 2010.