The reason is I don't want to do engineering work. For example, while I was doing my research, I was fabricating biosensor devices and I was very involved with the engineering side and we had a professor collaborator from the biology department who was guiding us on the biology side. To be honest, slowly, I started to get more and more absorbed to the biology side than the engineering side. I took a course in cancer biology after that which I really loved!, more than any other engineering courses that had taken before. So, I had a change of heart while doing my research. I don't mind doing some analytical work or device design for my research but I don't want engineering and computation be the major part of my research. I want to be involved and know as much as a biologist.