Capellan O, Hollander JE, Pollack C, Hoekstra JW, Wilke E, Tiffany B, Sites FD, Shofer FS, Gibler WB. Prospective evaluation of emergency department patients with potential coronary syndromes using initial absolute CK-MB vs. CK-MB relative index. J Emerg Med. 2003 May; 24(4):361-7.