¹ Department of Family Medicine, Soonchunhyang University Hospital Seoul, Soonchunhyang University College of Medicine ;

² Department of Family Medicine, Konyang University Hospital, Konyang University College of Medicine ;

³ Department of Family Medicine, Jeonju Jesus Hospital ;

⁴ Department of Family Medicine, Hanyang University Hospital, Hanyang University College of Medicine ;

⁵ Department of Family Medicine, Inje University Ilsan Paik Hospital, Inje University College of Medicine ;

⁶ Department of Family Medicine, Asan Medical Center, University of Ulsan College of Medicine ;

⁷ Asan Medical Center ;

⁸ Department of Family Medicine, Central Veterans Hospital