In all cases of serious injury or disease, especially those
requiring hospital treatment or prolonged care, OWCP will request
detailed narrative reports from the attending physician at periodic
intervals. The physician will be asked to describe continuing medical
treatment for the condition accepted by OWCP, a prognosis, a description
of work limitations, if any, and the physician's opinion as to the
continuing causal relationship between the employee's condition and
factors of his or her Federal employment.