Author Contributions P. Georgakopoulos carried out the study and contributed to study design, analysed the data, and wrote the article. P. Roussou contributed to overall study management. E. Matsakas and A. Karavidas carried out and analysed the echocardiograms. N. Anagnostopoulos supervised the data management. A. Galanopoulos and T. Marinakis were involved in data validation and in selection of the cohort. F. Georgiakodis and S. Zimeras did statistical analysis. M. Kyriakidis was the principal investigator and was involved in the study design and in the writing of the article. A. Ahimastos judged the article.