20. Which of the following statements about central post-stroke pain (CPSP) is FALSE? (A) The most common form of chronic pain after stroke is musculoskeletal pain and its ratio is estimated to be 40%. (B) Most of the CPSP develops with brain stem infarctions. (C) The lesion responsible for pain in CPSP is actually located in the contralateral thalamus. (D) The recommendations for the first-line treatment of central pain are as follows: pregabalin (150–600 mg/day), gabapentin (1200–3600 mg/day), and tricyclic antidepressant (25–150 mg/day). (E) Contraindications to treatment with tricyclic antidepressants, particularly in the elderly, include patients with cardiac conduction abnormalities, congestive heart failure, and convulsive disorders.