In this chapter:
(1) 'Board' means the Texas State Board of Medical Examiners.
(2) 'Intractable pain' means a state of pain for which:
(A) the cause of the pain cannot be removed or otherwise treated; and
(B) in the generally accepted course of medical practice, relief or cure of the cause of the pain:
(i) is not possible; or
(ii) has not been found after reasonable efforts.
(3) 'Physician' means a physician licensed by the board.