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JOURNAL.PONE.0153152
JOURNAL.PONE.0153152
http://dx.doi.org/10.1371/JOURNAL.PONE.0153152
"May I Buy a Pack of Marlboros, Please?" A Systematic Review of Evidence to Improve the Validity and Impact of Youth Undercover Buy Inspections
P356
Q26751382-1A3AF668-0896-4B52-8923-014EAB14B12A
P356
JOURNAL.PONE.0153152
http://dx.doi.org/10.1371/JOURNAL.PONE.0153152