by 박동균, Park Dong Gyun, 정승기, Jeong Seung Gi, 정문기, Jeong Mun Gi, 권오상, Kwon O Sang, 김선숙, Kim Seon Sug, 구양서, Gu Yang Seo, 김유경, Kim Yu Gyeong, 김연석, Kim Yeon Seog, 최덕주, Choe Deog Ju, 박창신, Park Chang Sin, 정운계, Jeong Un Gye
Published in The Korean journal of gastroenterology (25.10.2003)

by 이정남, 박창신, 김홍표, 황성연, 정운계
Published in Journal of toxicology and public health (2002)

by 한덕화, 동미숙, 정운계, 차용남
Published in Journal of toxicology and public health (1998)