As both a transplant nephrologist and translational researcher, my main interest area is the clinical epidemiologic studies based on post-transplant cohort. I have actively participated Korean Organ Transplantation Registry (KOTRY) project, and Asian Society of Transplantation Registry (ASTREG) project. Both are working as the data platform for solid organ transplantation patients clinical courses. Recently, my research topics involved tacrolimus metabolism, dominant risk factors of kidney transplantation, and impact of eplet mismatches. All those publications were based on the development of kidney transplantation cohort.