Factors Influencing Quality Improvement Success in Primary Care: A Comparative Case Study of High- and Low-Performing Sites in Patient Hypertension Outcomes. - Knapke JM; Kaur M; Patil SJ; Bolen SD; Stange KC; Wexler R; Caron A; Wright JT Jr; Fiegl J; Hill HE; Einstadter D; Love TE; et al. (Journal of the American Heart Association, 2026)