The majority of the references come from either "Duckro, Paul N. Taking Control of Your Headaches: How to Get the Treatment You Need" or "Buchholz, David. Heal Your Headache: The 1-2-3 Program for Taking Charge of Your Headaches". These are self-help books, sources that don't necessarily hold up to medical scrutiny. I own several of these books and they often contain a great detail of opinion and rely largely on anecdotal evidence. korbnep «talk» 08:50, 31 August 2012 (UTC)[reply]