Stratified Decision Forests for Accurate Anatomical Landmark Localization in Cardiac Images - Oktay, Ozan; Bai, Wenjia; Guerrero, Ricardo; Rajchl, Martin; de Marvao, Antonio; O’Regan, Declan P; Cook, Stuart A; Heinrich, Mattias P.; Glocker, Ben; Rueckert, Daniel (IEEE Transactions on Medical Imaging, 2017)