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Figure 6: The pharyngeal wall was retracted (a) using a pharyngeal retractor (arrow to left); Anterior constricting tissues were released (a and b) between the C1 anterior arch (arrow up) and at C2 shown as arrow pointing down (c)

Figure 6: The pharyngeal wall was retracted (a) using a pharyngeal retractor (arrow to left); Anterior constricting tissues were released (a and b) between the C1 anterior arch (arrow up) and at C2 shown as arrow pointing down (c)