Taegyun is a medical dermatologist who sees the patients with psoriasis, autoimmune rheumatic dermatoses, immunodeficiency, hematologic dermatoses, and chronic recalcitrant eczema. Taegyun does basic and translational research in dendritic cell-T cell interactions, autoimmune and tolerance mechanisms, and cutaneous mononuclear phagocyte system ontogeny and function especially focusing within the skin microenvironment.