Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 당신이 우울하고 불안해하는 이유, 신경전달물질이란?. That video is uploaded by Dr.김경철의 미래의학 at 2020-07-20T05:37:51-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [R1uIszRSwio]