Absence of harmful effects of protracted negative air ionisation.
D000390:Air Ionization; D005260:Female; D006632:Histamine / Q000652:urine; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine; D008297:Male; D012701:Serotonin / Q000502:physiology* / Q000652:urine; D013577:Syndrome; D013974:Thyroxine / Q000652:urine; D014887:Weather
D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D006632:Histamine; D013974:Thyroxine