Why are South Korean doctors on strike again?

South Korea’s largest group of doctors is staying away from hospitals, in protest against the government's plans to reform the medical sector. The Korean Medical Association, which represents 140,000 doctors, says they are taking collective action to help junior doctors who walked out of hospitals four months ago - a move that has left the healthcare system in disarray. CNA's East Asia Tonight delves into the reasons behind the prolonged walkout by doctors in South Korea, and why Seoul is moving forward with its medical reform plans despite the protests.