I typed in, "Mayo Cinic, insomnia" in my search engine and came up with an incredible amount of insight into sleep disorders and the causes. It also includes a significant number of ways to combat the problem. It's a lot of reading but they seem to have thoroughly searched the cause, effects and treatments. I suggest anyone with the problem,take a look at it It is highly possible that there is a treatment suited to their needs. I skimmed over it to begin with but I will be reading every word fom here on in. Hope it helps you. Mannie