Association between behavioral phenotypes and response to a physical activity intervention using gamification and social incentives: Secondary analysis of the STEP UP randomized cl... oleh Xisui Shirley Chen, Sujatha Changolkar, Amol S Navathe, Kristin A Linn, Gregory Reh, Gregory Szwartz, David Steier, Sarah Godby, Mohan Balachandran, Joseph D Harrison, Charles A L Rareshide, Mitesh S Patel