• American Psychological Association
• Anxiety and Depression Association of America
• Anxiety Canada
• Better Health
• Cedars-Sinai
• Cleveland Clinic
• Johns Hopkins
• Harvard Medical School
• Health Direct
• Healthline
• HelpGuide
• Kids Health
• Mayo Clinic
• McLean Hospital
• Medical News Today
• Medline Plus
• Mental Health America
• National Institute of Mental Health
• Psyche Central
• Psychology Today
• WebMD
• Weill Cornell Medicine