Assessment of cardiovascular risk and preparticipation screening protocols in masters athletes: the Masters Athlete Screening Study (MASS): a cross-sectional study oleh Barbara N Morrison, James McKinney, Saul Isserow, Daniel Lithwick, Jack Taunton, Hamed Nazzari, Astrid M De Souza, Brett Heilbron, Carlee Cater, Mackenzie MacDonald, Benjamin A Hives, Darren E R Warburton