**Acknowledgements**

Authors would like to thank Energy Clinic, luxury wellness spa chain in Croatia, for their donation for publishing this chapter.

### **Conflict of interest**

The authors declare no conflict of interest.

### **Author details**

Iskra Alexandra Nola1 and Zdeslav Radovčić2 \*

1 School of Medicine, Andrija Stampar School of Public Health, University of Zagreb, Zagreb, Croatia

2 Energy Clinic Wellness Academy, Dubrovnik, Croatia

\*Address all correspondence to: zdeslav@energyclinic.com

© 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.
