Corrigendum: Segmentation of Older Adults in the Acceptance of Social Networking Sites Using Machine Learning - Ramírez-Correa, Patricio E.; Rondán-Cataluña, F. Javier; Arenas-Gaitán, Jorge; Grandón, Elizabeth E.; Alfaro-Pérez, Jorge L.; Ramírez-Santana, Muriel (Frontiers in Psychology, 2021)