**Author details**

Panagiotis Athanassiou1 \*, Lambros Athanassiou<sup>2</sup> and Ifigenia Kostoglou-Athanassiou3

1 Department of Rheumatology, St. Paul's Hospital, Thessaloniki, Greece

2 Department of Rheumatology, Asclepeion Hospital, Voula, Athens, Greece

3 Department of Endocrinology, Asclepeion Hospital, Voula, Athens, Greece

\*Address all correspondence to: pathanassiou@yahoo.gr

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
