Mental health patients

Yeah, psychiatrists seem notorious for getting into the field to treat themselves.

possibly relevant;
Some people with chronic schizophrenia characterized by predominantly disorganized and negative symptoms have been found to have an unusual, specific odor to their sweat and they have also been found to have impairment detecting certain odors.

The chemical exuded in the sweat of these patients with chronic schizophrenia causing the distinct odor is a chemical called trans-3-methyl-2-hexenoic acid (MHA). Schizophrenia Daily News Blog: Chemical in Sweat and Inability to Smell it May be Schizophrenia Marker

And from this very forum;

My favorite odoriferous compound is 3-methyl-2-hexenoic acid. This is the essence of human sweat. One drop makes an entire room smell like the locker room of the Stanford Football team after losing to UC Berkeley in an overtime game on a hot day while wearing already smelly jerseys and soiled jock straps. It is super strong! Interestingly, people suffering from schizophrenia have a much higher concentration of this in their sweat. I have made a cologne consisting of 3-methyl-2-hexenoic acid with androstenedione and have found this to activate bonding and mating behavior in women. It is really amazing stuff!