"As the brain is not an easily accessible organ, mechanisms of disease initiation and progression remain a challenge to researchers."How many times do we have to tell you this isn't a brain problem, it's a gut problem?
Seriously dude, we have been telling you that for over a decade.
Is it really so difficult to wrap your Psychiatrist mind around the idea that Orexin cells project into the periphery and are accessible from there?
That is frakking self evident. What. The. Hell.