Mitral annulus is dilated with preserved function in acromegaly regardless of its activity: Insights from the three-dimensional speckle-tracking echocardiographic MAGYAR-Path Study Attila Nemes; Árpád Kormányos; Péter Domsik; Anita Kalapos; Csaba Lengyel; Nóra Ambrus; Zsuzsanna Valkusz;