Longitudinal high-frequency ethnographic interviewing to simulate and prepare for intensive smartphone data collection among veterans with homeless experience oleh D. Keith McInnes, D. Keith McInnes, Shawn Dunlap, Gemmae M. Fix, Gemmae M. Fix, Marva V. Foster, Marva V. Foster, Marva V. Foster, Jennifer Conti, Jill S. Roncarati, Jill S. Roncarati, Jill S. Roncarati, Justeen K. Hyde, Justeen K. Hyde