임상 데이터가 필수였는데, 이를 전임 서울대 원장인 전상훈 흉부외과 과장의 도움으로 얻을 수 있었다.
Clinical data was essential, and it could be obtained with the help of Jeon Sang-hoon, a former Seoul National University president, and Jeon Sang-hoon, chief of Cardiothoracic Surgery.