Cohort Profile: Design and methods of the PREDIMED-Plus randomized trial. (22nd November 2018) - Martínez-González, Miguel A; Buil-Cosiales, Pilar; Corella, Dolores; Bulló, Monica; Fitó, Montserrat; Vioque, Jesús; Romaguera, Dora; Martínez, J Alfredo; Wärnberg, Julia; López-Miranda, Jose; Estruch, Ramón; Bueno-Cavanillas, Aurora; et al.