Incidence, Clinical Factors, and Endotype Characterization of Coronary Microvascular Dysfunction in Patients With Non-Obstructive Coronary Artery Disease Undergoing 13N-Ammonia Positron Emission Tomography. - Miura S; Okizaki A; Manabe O; Kumamaru H; Miyazaki C; Yamashita T (Circulation journal : official journal of the Japanese Circulation Society, 2026)