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Figure 1: (a) FOB view showing “blue suture” (arrow marks) around the tracheal tube inside the reconstructed trachea. (b) In vitro picture of similar tracheal tube without any such blue marking

Figure 1: (a) FOB view showing “blue suture” (arrow marks) around the tracheal tube inside the reconstructed trachea. (b) <i>In vitro</i> picture of similar tracheal tube without any such blue marking