On 1/28/16 we had annual refresher, EE states chest was hurting some, but did not go to Doctor. 1/29/16 EE went to work then chest still hurting so called spouse, spouse took EE to ER. We called MSHA 800 and reported. This injury was not job related, EE had inflammation of the cartilage (bone that attaches the ribs to breastbone)