Corresponding Author

Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea

Correspondence

Hye Sook Choi, Department of Internal Medicine, Kyung Hee University Hospital, 23 Kyung Hee Dae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.

Email: maxymus72@hanmail.net