**Author details**

Ayrat U. Ziganshin\* and Sergey N. Grishin Kazan State Medical University, Kazan, Russia

\*Address all correspondence to: auziganshin@gmail.com

© 2018 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.
