Defining successful program configurations in VA home-based primary care: a study protocol to identify key difference-makers through investigating cross-case heterogeneity in program implementation. - Tuepker A; Miech EJ; Hulen EC; Niederhausen M; Hwang CS; Kinosian B; O'Neill A; Wiederholt SG; Penn C; Cooper D; Edwards ST (BMC geriatrics, 2025)