About the Authors

Joo-Hyun Park

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University college of Medicine, Goyang, Korea

Hye Kyeong Park

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University college of Medicine, Goyang, Korea

Hoon Jung

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University college of Medicine, Goyang, Korea

Sung-Soon Lee

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University college of Medicine, Goyang, Korea

Hyeon-Kyoung Koo

gusrud9@yahoo.co.kr

Affiliation Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University college of Medicine, Goyang, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JHP HKK. Performed the experiments: JHP HKK. Analyzed the data: JHP HKK. Contributed reagents/materials/analysis tools: JHP HKP HJ SSL HKK. Wrote the paper: JHP HKK.