1 Department of Cardiology, the Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, China.
2 NOVA Information Management School, Universidade Nova de Lisboa, Campus de Campolide, 1070-312 Lisboa, Portugal. Electronic address: d20210033@novaims.unl.pt.
3 NOVA Medical School, Universidade NOVA de Lisboa, Campo Mártires da Pátria, 130-1169-056 Lisboa, Portugal. Electronic address: ana.timoteo@nms.unl.pt.