Conflict of interests

Authors declare that no conflict of interest exists.

Ethical approval

This study was performed in line with the principles of the Declaration of Helsinki. The protocol was reviewed and approved by the Ethics Committee “Campania 3”.

Human and animal rights

This study does not contain any studies with animals performed by any of the authors. The present study complies with the guidelines for human studies.

Informed consent to participate

Written informed consent was obtained from all subjects to participate in the study.