by 정정조(Cheong Jo Cheong)
Published in Daehan hwan'gyeong gonghag hoeji (2010)

by 정정조(Cheong Jo Cheong)
Published in Daehan hwan'gyeong gonghag hoeji (2008)

by Nam, Soon Woo, Jung, Jeong Jo, Bae, Si Hyun, Choi, Jong Young, Yoon, Seung Kew, Cho, Se Hyun, Han, Joon Yeol, Han, Nam Ik, Yang, Jin Mo, Lee, Young Suk
Published in The Korean journal of internal medicine (01.06.2007)

by 정정조
Published in Environmental engineering research (01.02.2004)

by 정정조(Cheong Jo Cheong)
Published in Daehan hwan'gyeong gonghag hoeji (2008)

by 정정조, Cheong, Cheong-Jo
Published in Daehan hwan'gyeong gonghag hoeji (2008)

by 정정조(Cheong Jo Cheong), 이영식(Young Sik Lee)
Published in Daehan hwan'gyeong gonghag hoeji (2005)

by 염주옥, Ju Ok Yeom, 윤승배, Seung Bae Yoon, 김재경, Jae Gyung Kim, 오정환, Jung Hwan Oh, 전은정, Eun Jung Jeon, 정정조, Jeong Jo Jeong, 최상욱, Sang Wook Choi, 이성, Seong Lee
Published in The Korean journal of gastroenterology (30.06.2009)

by 송홍석, 정정조, 송경섭, 전은정, 지병수, 전연주, 최상욱
Published in The Korean journal of medicine (01.05.2007)

by 정수연, Soo Yeon Jung, 신주영, Ju Young Shin, 전은정, Eun Jung Jeon, 오정환, Jung Hwan Oh, 정정조, Jeong Jo Jeong, 한남익, Nam Ik Han, 최상욱, Sang Wook Choi
Published in The Korean journal of medicine (2009)

by 김민희, 최승혜, 정정조, 김미경, 이성, 서은주, 최상욱
Published in The Korean journal of medicine (01.12.2005)

by 정정조, 최명규, 조유경, 전은정, 조영석, 정우철, 이인석, 김상우, 최상욱, 정인식
Published in Journal of neurogastroenterology and motility (01.06.2004)

by 송홍석, Hong Seok Song, 정정조, Jeong Jo Jeong, 송경섭, Kyung Sup Song, 전은정, Eun Jung Jeon, 지병수, Byoung Soo Jie, 전연주, Yeon Joo Chun, 최상욱, Sang Wook Choi
Published in The Korean journal of medicine (01.05.2007)

by 오정환, Jung Hwan Oh, 최명규, Myung Gyu Choi, 김혜랑, Hye Rang Kim, 박재명, Jae Myung Park, 백창렬, Chang Nyol Paik, 이준욱, Joon Wook Lee, 조유경, Yu Kyung Cho, 전은정, Eun Jung Jun, 정정조, Jeong Jo Jeong, 이인석, In Seok Lee, 김상우, Sang Woo K
Published in Journal of neurogastroenterology and motility (30.06.2006)

by 박두호
Published in The Korean journal of gastroenterology (01.10.2003)

by 김민희, Min Hee Kim, 최승혜, Seung Hye Choi, 정정조, Jeong Jo Jeong, 김미경, Mee Kyoung Kim, 이성, Seong Lee, 서은주, Eun Joo Seo, 최상욱, Sang Wook Choi
Published in The Korean journal of medicine (01.12.2005)

by 정정조, Jeong Jo Jeong, 최명규, Myung Gyu Choi, 조유경, Yu Kyung Cho, 전은정, Eun Jung Jun, 조영석, Young Seok Cho, 정우철, Woo Chul Chung, 이인석, In Seok Lee, 김상우, Sang Woo Kim, 최상욱, Sang Wook Choi, 정인식, In Sik Chung
Published in Journal of neurogastroenterology and motility (30.06.2004)

by 정정조, 강화영, 박상숙, 라덕관, 오카다미쯔마사, Jeong, Jeong-Jo, Gang, Hwa-Yeong, Park, Sang-Suk, Ra, Deok-Gwan
Published in Environmental engineering research (2002)

by 김상우, Kim Sang U, 이학성, Lee Hag Seong, 윤승규, Yun Seung Gyu, 정우철, Jeong U Cheol, 조영석, Jo Yeong Seog, 정정조, Jeong Jeong Jo, 이인석, Lee In Seog, 이강문, Lee Gang Mun, 이동수, Lee Dong Su, 최명규, Choe Myeong Gyu, 정인식, Jeong In Sig
Published in The Korean journal of gastroenterology (25.10.2003)

by 정우철, Woo Chul Chung, 조영석, Young Seok Cho, 정정조, Joeng Jo Jeong, 이인석, In Seok Lee, 김상우, Sang Woo Kim, 양진모, Jin Mo Yang, 최명규, Myung Gyu Choi, 정인식, In Sik Chung, 박두호, Doo Ho Park
Published in The Korean journal of gastroenterology (30.01.2003)