From Online Randomized Controlled Trials to Participant Preference Studies: Morphing the San Francisco Stop Smoking Site into a Worldwide Smoking Cessation Resource

Ricardo F Muñoz   ¹ , PhD ;   Adrian Aguilera   ² , PhD ;   Stephen M Schueller   ¹ , PhD ;   Yan Leykin   ³ , PhD ;   Eliseo J Pérez-Stable   ¹ , MD

¹ Internet World Health Research Center, Department of Psychiatry, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA, United States

² School of Social Welfare, University of California, Berkeley, Berkeley, CA, United States

³ Department of Psychiatry, University of California, San Francisco, San Francisco, CA, United States