Hyojin Chae, M.D. ¹, Hyejeong Kim, B.S.¹, Jeong Eun Kim, M.T.¹, Jeong Joong Lee, M.T.¹, Sung-Eun Cho, M.D.², Sollip Kim, M.D.³, Kyunghoon Lee, M.D.⁴, Sang-Guk Lee, M.D.⁵, Yong-Wha Lee, M.D.⁶, Hyung-Doo Park, M.D.⁷, Seungman Park, M.D.⁸, Sang Hoon Song, M.D.⁹, Sail Chun, M.D.³, Junghan Song, M.D.⁴, Clinical Mass Spectrometry Research Committee (CMSRC), in affiliation with the Korean Society of Clinical Chemistry (KSCC)