Bing found the following results
Depression (major depressive disorder) - Symptoms and causes
Clinical depression: What does that mean? - Mayo Clinic
Depression - National Institute of Mental Health (NIMH)
Depression (major depressive disorder) - Mayo Clinic
Clinical Depression (Major Depressive Disorder) - Cleveland Clinic
Clinical Depression: Symptoms, Diagnosis, Treatment - Verywell …
Depression - National Institute of Mental Health (NIMH)
Depressive disorder (depression) - World Health Organization …
Psychiatry.org - What Is Depression?
Depression: Causes, Symptoms, Types & Treatment - Cleveland …