Harvard University
Harvard Medical Center: Cushing's Syndrome
This site contains information dealing with Cushing's Syndrome and Corticotropin-releasing hormone (CRH) testing.
National Institutes of Health
Nat. Institute of Diabetes and Digestive and Kidney Diseases: Cushing's Syndrome
This site has a lot of information on Cushing's Syndrome and all its symptoms.
WebMD
Web Md: Cushing's Syndrome
This site details the causes, symptoms, treatments and supports for Cushing's Syndrome, a rare disorder in which the body has high levels of cortisol.
Khan Academy
Khan Academy: Cushing's Syndrome and the Hypothalamic Pituitary Axis
Questions related to the functions of the endocrine systems and ways in which hormones coordinate the organ systems.