Hi everyone -- Marcus's son here. Thank you all for the love and warmth here in this thread. To answer the question about "what happened", it was esophagus cancer -- we found out about it in September, but by that point it was advanced to a level where not much could be done. We tried anyway -- chemo, radiation, etc. But, well... I know he cared a whole lot about all of you guys. When I would see him or talk to him on the phone, he would often update me on what was going on here on PF, and how he was starting a poll or posting a summary of various papers or whatever else he would do on a regular basis. I empathized with how he felt about PF, since my generation grew up with the internet and I thought it was wonderful to see him bonding as deeply with you guys as I've bonded with the online communities I'm part of. You guys rock. Hugs to you all.