Factors Affecting Root Canal Treatment Case Difficulty, Practitioner Rating of Difficulty and Treatment Complications Among General Dentists and Endodontists: A Prospective Cohort Study From National Dental Practice-Based Research Network PREDICT Project. - Law AS; Nagarkar S; Funkhouser E; Mungia R; Nixdorf DR; Lam EWN; Nosrat A; Roda RS; Gilbert GH (International endodontic journal, 2025)