Position statement of the brazilian society of cardiology department of exercise testing, sports exercise, nuclear cardiology, and cardiovascular rehabilitation (Derc/sbc) on activities within its scope of practice during the covid-19 pandemic Posicionamento do Departamento de Ergometria, Exercício, Cardiologia Nuclear e Reabilitação Cardiovascular (DERC/SBC) sobre a Atuação Médica em suas Áreas Durante a Pandemia por COVID-19 - Grossman G.B. (2020)