4
My sincere thanks also go to my bosses and colleagues at VNUH – Dr. Nguyen Hoa,
Ms.
Hoang Thi Xuan Hoa, Dr. Do Tuan Minh, Mr. Le
Van Canh, Ms. Luong Quynh
Trang, Ms. Vu Mai Trang, Ms. Nguyen Thu Ha and my friends Ms.
Nguyen Thuy
Anh, Mr. Jason Sparks and Dr. Pham Hoa Hiep for their constant support while I
have been on leave completing my project.
And last but by no means least, my heartfelt thanks are due to my loving parents and
brother
for their unconditional love, understanding, encouragement and support over
time and distance.