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Post-traumatic stress disorder (PTSD) - Symptoms and causes
Post-Traumatic Stress Disorder - National Institute of Mental
Post-traumatic stress disorder - Wikipedia
Psychiatry.org - What is Posttraumatic Stress Disorder (PTSD)?
PTSD: What It Is and How to Cope - Verywell Health
Post-traumatic stress disorder (PTSD) - Mayo Clinic
PTSD (Post-Traumatic Stress Disorder) - Cleveland Clinic
PTSD Basics - PTSD: National Center for PTSD
Post-Traumatic Stress Disorder | Psychology Today
Posttraumatic Stress Disorder (PTSD) - WebMD