Arayawudhikul, N.; Sakboon, B.; Cheewinmetasiri, J.; Chartirungsun, A.; Sripisuttrakul, B.; Muenpa, R. Preliminary Report of Off-Pump Coronary Artery Bypass Grafting (OPCABG) at Lampang Hospital. Thai J Surg 2014, 35, 6-10.