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  Indian J Med Microbiol
 

Figure 1: This graph represents the comparison of air bone gap mean in preoperative, patch test and postoperative status at each of the following frequencies: 500 Hz, 1KHz, 2KHz, and 4KHz

Figure 1: This graph represents the comparison of air bone gap mean in preoperative, patch test and postoperative status at each of the following frequencies: 500 Hz, 1KHz, 2KHz, and 4KHz