Hellow guys, Welcome to my website, and you are watching "대장암 발병, 음주보다 흡연이 더 위험" / YTN 사이언스. and this vIdeo is uploaded by YTN 사이언스 at 2015-10-25T22:53:36-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
