Figure 1From: Weak expression of cyclooxygenase-2 is associated with poorer outcome in endemic nasopharyngeal carcinoma: analysis of data from randomized trial between radiation alone versus concurrent chemo-radiation (SQNP-01)COX-2 Immunohistochemistry Patterns – typical examples. A: Negative staining for COX-2 ×200. B: Weak staining for COX-2 ×200. C: Moderate staining for COX-2 ×200. D: Strong staining for COX-2 ×200.Back to article page