Correction to: Medical Gas Research, 2016;6(1):33-38, published date: 4 April, 2016, doi: 10.4103/2045-9912.179343In the original version of this article, an error occurred in the corresponding author's email. The email of corresponding author Xin-chun Jin “xin-chunjin@gmail.com” should be “xinchunjin@gmail.com”.Medical Gas Research would like to apologize to the authors and readers for the error and any confusion this may have caused.