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Natl Med J China , October 10 ,2003 ,Vol 83 , No. 19overall risks and management . complementary roles for COX22 inhibitorsgastrointestinal complications in patients with rheumatoid arthritisand proton pump inhibitors. Gut , 2003 ,52 :6002608. receiving nonsteroidal anti2inflammatory drugs. Ann Intern Med ,1995 ,4 Mamdani M , Rochon PA , Juurlink DN , et al . Observational study ofupper ga