Screening for HFpEF in pacemaker patients: Study design and protocol of the PM-HFpEF study. - Santos, Elisabeth; Teixeira, Rafael; Almeida, João; Fonseca, Paulo; Oliveira, Marco; Gonçalves, Helena; Primo, João; Diaz, Sílvia; Barros, António; Vilela, Eduardo; Sampaio, Francisco; Saraiva, Francisca; et al. (PLoS ONE, 2026)