Text and Data Mining valid from 2019-08-09
Received: 12 April 2019
Accepted: 15 July 2019
First Online: 9 August 2019
Compliance with Ethical Standards
: E. Carlos Rodriguez-Merchan, MD, PhD, Carlos A. Encinas-Ullan, MD, and Primitivo Gomez-Cardero, MD, declare that they have no conflicts of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2013.
: Informed consent was waived from all patients for being included in this study.
: Disclosure forms provided by the authors are available with the online version of this article.