Department of Internal Medicine, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, 150, Seongan-ro, Gangdong-gu, Seoul, 05355, Korea. Department of Internal Medicine, College of Medicine, Hallym University, Kangdong Sacred Heart Hospital, 150, Seongan-ro, Gangdong-gu, Seoul, 05355, Korea. isaac9713@gmail.com.