A man whose body was left at a hospital by Jack Kevorkian suffered from a painful but nonfatal muscle disorder, according to a note left by the doctor.

Kevorkian and an associate, Dr. Georges Reding, brought the body Thursday evening to the emergency room at Huron Valley Hospital, hospital spokeswoman Leigh Sullivan said.A note with the body identified the man only as a 42-year-old from Boston. The note said the man suffered from fibromyalgia, a painful muscle disorder that Sullivan said is not considered fatal.

The county medical examiner was to perform an autopsy Friday.