http://www.washingtonpost.com/news/morning-mix/wp/2015/02/24/how-stephen-hawking-survived-longer-than-possibly-any-other-als-patient/ http://www.washingtonpost.

http://www.washingtonpost.com/news/morning-mix/wp/2015/02/24/how-stephen-hawking-survived-longer-than-possibly-any-other-als-patient/ http://www.washingtonpost.com/news/morning-mix/wp/2015/02/24... ^ Clickthrough to the actual article.