Dedication

To my parents, I’m learning from you how one should never give up even when life becomes the hardest possible. As usual, you taught me the most important lessons in life. The more time goes on, the more I understand what you have done for me. Thank you!

To my best friend Nadia, who always finds a way to make me smile when things become so difficult and is always able to find positive perspectives when I cannot. You have really been one of the most important people in my whole life for more than 10 years, and I will always be there for you.