Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 우울증의 원인, 신경전달물질의 불균형 / YTN 라이프. That video is uploaded by YTN2 at 2017-09-24T22:03:14-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [LPFZvkIReGI]