Received: 25 February 2019
Accepted: 24 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: Ethical approval: This is an observacional and retrospective study. This study is in accordance with the ethical standards of 1964 Helsinki declaration and its later amendments or comparable ethical standards. It has a positive approval by the Investigational Ethical Comission of Hospital Universitario de Fuenlabrada.Informed consent: For this type of study formal consent is not required. This is an observational retrospective study without interventions and without medicaments.
: Not applicable.
: The authors declare that they have no competing interests.