At the San Francisco AIDS Foundation, staff members Tyrone Clifford (left) and Rick Andrews (right) demonstrate how a contingency management visit typically begins, with a participant picking up a specimen cup for a urine sample. If the sample tests negative for meth or cocaine use, the participant has an incentive dollar amount added to their "bank" which can later be traded for a gift card.
Christopher Artalejo-Price/San Francisco AIDS Foundation
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