Study design and participants
This was a prospective, open‐label, single center, single‐arm, phase 2 trial performed at Asan Medical Center, Seoul, Republic of Korea. Eligible patients were aged at least 18 years with a pathologically proven diagnosis of The study was conducted in accordance with the principles of the Declaration of Helsinki and the International Conference on Harmonization guidelines for Good Clinical Practice. The study protocol was approved by the institutional review boards of Asan Medical Center (IRB no.: 2019‐1493). All of the patients provided written informed consent.