I just want to thank the editors here for a breakthrough moment for me upon reading the article.  I've had the same 3am-11ish sleep pattern for the last 23 years, with occasional episodes of N2HSS, and only lately have found a line of work compatible with that pattern.  I'm a music composer for tv shows and films, so I work on deadlines.  I'm very excited to learn more about this, and get started on a treatment plan, because it would be nice to not have to always schedule meetings in the afternoon. Cheers!