Editor's Letter: Emmet Ryan

In the summer of 2011, I developed a problem sleeping. It wasn’t the first time, and the previous bouts hadn’t been too bad. I’d always managed to get matters sorted. This time was different. It persisted.

For close to 12 months I typically got two to three hours of sleep a night. Getting four was a good night, and those were few in number. Given my GP had told me that once this ...