Text and Data Mining valid from 2020-02-11
Received: 26 July 2019
Accepted: 27 January 2020
First Online: 11 February 2020
Ethics Approval and Consent to Participate
: Not applicable (review article without involving animals, human participants, human data, or human tissue).
: Not applicable.
: The authors, Michael-Alexander Malahias, Dimitrios Chytas, Vasileios Raoulis, Efstathios Chronopoulos, Emmanouil Brilakis, and Emmanouil Antonogiannakis, declare that they have no competing interests relevant to the content of this review.