Funding for this research was provided by:
Ministerio de Educación, Cultura y Deporte (17/00408, 16/01531)
Text and Data Mining valid from 2019-04-03
Received: 28 September 2018
Accepted: 25 March 2019
First Online: 3 April 2019
Compliance with ethical standards
: All patients’ data are confidential.
: The authors declare that they have no conflict of interest.