Gunnar_Zarncke comments on Open thread, Apr. 18 - Apr. 24, 2016

[Gunnar_Zarncke]

For comparison: http://​​www.frontiersin.org/​​files/​​Articles/​​93218/​​fneur-05-00081-HTML/​​image_m/​​fneur-05-00081-g001.jpg