%0 Journal Article %T Efficacy of Contextually Tailored Suggestions for Physical Activity: A Micro-randomized Optimization Trial of HeartSteps %A Klasnja,, Predrag %A Smith,, Shawna %A Seewald, Nicholas, J %A Lee,, Andy %A Hall,, Kelly %A Luers,, Brook %A Hekler, Eric, B %A Murphy, Susan, A %J Annals of Behavioral Medicine %V 53 %N 6 %@ 0883-6612 %D 2019-05-03 %~ DeepDyve