As DDx gets ready to launch season two, we're re-releasing our first season.

A 19-year-old with sickle cell disease is well-known to ER doctors as a "frequent flyer". Every time they see her it's due to chronic pain related to her disease. Except for the one time it isn't. 

For related photos, medical cases and links to research on cognitive bias, visit Figure1.com/DDx.