89.以下何者不是 esophageal squamous cell carcinoma 之 risk factor?
(A)Plummer-Vinson syndrome.
(B)Esophageal caustic injury.
(C)Esophageal fibrovascular polyps.
(D)Achalasia.
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統計: A(1), B(0), C(2), D(0), E(0) #2791701
統計: A(1), B(0), C(2), D(0), E(0) #2791701