Cardiology Department, University Hospital Quironsalud, Madrid, Spain
Received 22 January 2019 Revised 26 April 2019 Accepted 16 May 2019
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Correspondence to Belén Rubio Alonso, MD, Cardiology Department, University Hospital Quironsalud, Calle Diego de Velázquez 1, 28223 Madrid, Spain Tel: +34 914 521 900; fax: + 34 914 521 971; e mail: email@example.com