**Acknowledgements**

I want to thank the people working at EVEX hospitals-Krystyna Kiel Oncology Center for their encouragement and advice that led to the completion of this paper. I also thank my friends for their encouragement and words of advice. Special thanks to my mentor—Krystyna Kiel. Finally, if not for my family, who supports me all the time, I would never be able to work on this extraordinary project.
