==== Front
J Korean Med SciJ. Korean Med. SciJKMSJournal of Korean Medical Science1011-89341598-6357The Korean Academy of Medical Sciences 10.3346/jkms.2018.33.e237CorrespondenceErratum: Correction of Phrase: Risk Factors Associated with Estimated Glomerular Filtration Rate in Patients with Rheumatoid Arthritis and Ankylosing Spondylitis after Treatment with Biological Disease Modifying Anti-Rheumatic Drugs https://orcid.org/0000-0003-1213-1254Lee Sung Won 02 8 2018 13 8 2018 02 8 2018 33 33 e237© 2018 The Korean Academy of Medical Sciences.2018The Korean Academy of Medical SciencesThis is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.Risk Factors Associated with Estimated Glomerular Filtration Rate in Patients with Rheumatoid Arthritis and Ankylosing Spondylitis after Treatment with Biological Disease Modifying Anti-Rheumatic Drugs
==== Body
To the Editor,

We found an error in the above published article, and correct the error as below:

Old phrase on the bottom of the first page:

They reported that the annual change in epidermal growth factor receptor (eGFR) …

Corrected phrase:

They reported that the annual change in estimated Glomerular Filtration Rate (eGFR) …

Thank you.