Ann Rehabil Med 2016;40(5):851-861
To the Editor,
We found an error of funding acknowledgment in this article. The correct acknowledgment is as follows:
The authors would like to thank Pusan National University Hospital Regional Center for Respiratory Diseases for its support in this work. This work was supported by a 2-year research grant from Pusan National University in 2015.
We apologize for any inconvenience this may have caused.
Yours sincerely,
Yong Beom Shin