Global mapping of randomised trials related articles published in high-impact-factor medical journals: a cross-sectional analysis. - Catalá-López, Ferrán; Aleixandre-Benavent, Rafael; Caulley, Lisa; Hutton, Brian; Tabarés-Seisdedos, Rafael; Moher, David; Alonso-Arroyo, Adolfo (Trials, 2020)