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Enteroscopy for the initial evaluation of iron deficiency.
Chak A, Cooper GS, Canto MI, Pollack BJ, Sivak MV Jr. Chak A, et al. Among authors: cooper gs. Gastrointest Endosc. 1998 Feb;47(2):144-8. doi: 10.1016/s0016-5107(98)70347-5. Gastrointest Endosc. 1998. PMID: 9512279
Effectiveness of ERCP in cholangitis: a community-based study.
Chak A, Cooper GS, Lloyd LE, Hammar PJ, Issa K, Rosenthal GE. Chak A, et al. Among authors: cooper gs. Gastrointest Endosc. 2000 Oct;52(4):484-9. doi: 10.1067/mge.2000.108410. Gastrointest Endosc. 2000. PMID: 11023564
322 results