We understand so little about the brain I'm not sure how meaningful a label like FNSD is. I bet there are a bunch of issues that could be classified as FNSD tod

We understand so little about the brain I'm not sure how meaningful a label like FNSD is. I bet there are a bunch of issues that could be classified as FNSD today but will be one day understood as different well-defined disorders. And there are a lot of diseases with complicated interplay between inherent biology and the environment.