A national survey on prevalence of possible echocardiographic red flags of amyloid cardiomyopathy in consecutive patients undergoing routine echocardiography: study design and patients characterization — the first insight from the AC-TIVE StudyMarco Merlo, Gianfranco Sinagra, Elisa Giacomin et al.|European Journal of Preventive Cardiology|2021Cited by 46