Dr. Dieter Kunz, sleep researcher # 28.10.2010 # In good shapeTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoConstanze Tress10/20/2010October 20, 2010# Dr. Dieter Kunz, sleep researcher # 28.10.2010 # In good shapehttps://p.dw.com/p/PjPoAdvertisement