Center for Farmers' Safety and Health, Chungbuk National University Hospital, Cheongju, Republic of Korea;
Department of Preventive Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea;
Center for Farmers' Safety and Health, Chungbuk National University Hospital, Cheongju, Republic of Korea;
Department of Preventive Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea;
Center for Farmers' Safety and Health, Chungbuk National University Hospital, Cheongju, Republic of Korea;
Department of Preventive Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea;
Center for Farmers' Safety and Health, Chungbuk National University Hospital, Cheongju, Republic of Korea;
Department of Dermatology, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea;
Center for Farmers' Safety and Health, Chungbuk National University Hospital, Cheongju, Republic of Korea;
Department of Preventive Medicine, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea;