Interesting article linking lack of sleep to increased cancer risk

A friend of mine recently sent me the link to this article that links sleep deprivation to an increased risk in cancer, and I found it to be so interesting that I wanted to share it with the community here. It's amazing to me how many serious illnesses are now being linked to lack of sleep; I know I read something not too long ago that connected sleep deprivation to an increased risk of developing diabetes. What do you think about this article and the study?

http://www.reuters.com/article/healthNews/idUSTRE4AG7B520081117