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Alicia Vera, Daniela Abramovitz, Remedios Lozada, Gustavo Martinez, M G Rangel, Hugo Staines, Thomas L Patterson and Steffanie A Strathdee*
* Corresponding author: Steffanie A Strathdee sstrathdee@ucsd.edu
BMC Public Health 2012, 12:653 doi:10.1186/1471-2458-12-653