Alper, Emrah, and Mahmut Arabul. “Serum Myeloperoxidase, CPK, CK-MB, and CTnI Levels in Early Diagnosis of Myocardial Ischemia During ERCP; Once or Repeated Once?”. Turkish Journal of Gastroenterology, vol. 25, no. 4, Jan. 2014, pp. 452-3, doi:10.5152/tjg.2014.0020.