If, after a claim for compensation is filed pursuant to NRS 617.344:
1. The employee seeks treatment from a physician or chiropractic physician for a newly developed injury or disease; and
2. The employee’s medical records for the occupational disease reported do not include a reference to the injury or disease for which treatment is being sought,
Ê the injury or disease for which treatment is being sought must not be considered part of the employee’s original claim for compensation unless the physician or chiropractic physician establishes by medical evidence a causal relationship between the injury and disease for which treatment is being sought and the occupational disease reported pursuant to NRS 617.344.