Table 1.

PCP Focus Group Format at each Timepoint (T1, T2, T3)

Time		Focus Group (FG) Content Presented	Focus Group Discussion
Month 1	T1	Describe SOVA and potential implementation influences (i.e. intervention source, evidence, design, relative advantage, adaptability)	Perceptions about current practice, need for intervention, potential barriers and facilitators to implementation, acceptability to patients
Month 2	Post-FG Activity: Adaptations to intervention, development of implementation strategies, decisions how to best measure implementation outcomes
Month 3	T2	Propose implementation strategies, tools developed, potential techniques to measure implementation	Feedback on proposed strategies, tools, measurement; how PCPs envision introducing site to families
Months 4–8	Post-FG Activity: PCPs begin implementing intervention, recruit participants fitting engagement study criteria
Month 9	T3	Present results of implementation outcomes and user engagement	Assess fidelity, what actual barriers and facilitators were