The Institutional Review Board number appears incorrectly in the article. The correct Institutional Review Board number is 26-2016-40.
The penultimate sentence of the Study population sub-section in the Materials and methods section should read: This study was carried out in accordance with the 1975 Helsinki Declaration and was approved by Seoul Metropolitan Government-Seoul National University (SMG-SNU) Boramae Medical Center Institutional Review Board (26-2016-40).
Reference
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