- Effect of prize-based incentives on outcomes in stimulant abusers in outpatient psychosocial treatment programs: a national drug abuse treatment clinical trials network study. Petry, N.M., Peirce, J.M., Stitzer, M.L., Blaine, J., Roll, J.M., Cohen, A., Obert, J., Killeen, T., Saladin, M.E., Cowell, M., Kirby, K.C., Sterling, R., Royer-Malvestuto, C., Hamilton, J., Booth, R.E., Macdonald, M., Liebert, M., Rader, L., Burns, R., DiMaria, J., Copersino, M., Stabile, P.Q., Kolodner, K., Li, R. Arch. Gen. Psychiatry (2005)