Ha J, Kim J, Park J, Kim KJ, Oh E, Choi J, Kweon H, Cho D.  The Association between Urine Specific Gravity and Obesity in Men in Korea: The Fifth Korean National Health and Nutrition Examination Survey in 2010-2012.  KJFP 2018;8:747-751.  https://doi.org/10.21215/kjfp.2018.8.5.747