%0 Journal Article %T Distinct relationship between HLA-DR genes and intractability of ulcerative colitis. %A Masuda, H %A Nakamura, Y %A Tanaka, T %A Hayakawa, S %J The American journal of gastroenterology %V 89 %N 11 %P 1957-62 %@ 0002-9270 %D 1994-11-23 %~ DeepDyve