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Proximal black esophagus: a case report and review of the literature |
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| Authors: | David A. Neumann II Dawn L. Francis MD MHS Todd H. Baron MD |
| Affiliation: | Department of Internal Medicine (D.A.N.II), Department of Gastroenterology and Hepatology (D.L.F., T.H.B.), Mayo Clinic, Rochester, Minnesota, USA |
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