To the Editor:
The authors regret that there were errors in Affiliations. This notice corrects the second affiliation, by adding following affiliation “School of Medicine, Pusan National University”.
Content of correction:
Present corrected the affiliation 2 as follows “Division of Allergy, Pulmonary and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.”