TY - JOUR T1 - Monetary incentives: a useful strategy for enhancing enrollment and promoting participation in HIV/STD risk reduction interventions. JF - Sexually Transmitted Infections JO - Sex Transm Infect SP - 239 LP - 240 DO - 10.1136/sti.74.4.239 VL - 74 IS - 4 AU - R Diclemente AU - G M Wingood Y1 - 1998/08/01 UR - http://sti.bmj.com/content/74/4/239.abstract ER -