An SY, Kang HE, Kim SM, Sok SA, Yang HJ, Lee GN.  Association between Sitting Time and Diabetes Mellitus, Cardiovascular Disease and Metabolic Syndrome in Korean: The Sixth Korean National Health and Nutrition Examination Survey 2013 and 2014.  KJFP 2017;7:588-595.  https://doi.org/10.21215/kjfp.2017.7.4.588