Ultrasound guided psoas compartment block and sciatic nerve block for revision arthroplasty of the knee performed two times in a patient with ankylosing spondylitis. Bangladesh J Med Sci [Internet]. 2020 Apr. 12 [cited 2026 Jul. 3];19(4):772-4. Available from: https://www.banglajol.info/index.php/BJMS/article/view/46641