I'm not sure whether it's appropriate to mention this or not, but I was just looking up the authors of that paper to see what they're doing now. Very sadly, I found out that one of the authors, Emil Stefanov, died last year at the age of 26.
Thank you for posting this (it was quite a surprise to see his name here).
I was a close friend of Emil for a long time. Before he passed, I had gotten busy with work and hadn't spoken to him in a while. I saw some of our mutual friends the weekend before it happened and had planned to call him. Really wish I had made that call sooner.
http://www.rememberingemil.org