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  Indian J Med Microbiol
 

Figure 4: A bony ostium is fashioned in the nasal bone (in the lacrimal fossa) with one of the puncturing instruments. (Courtesy to Profes sor Dr. K. Abou-Sedira MD ).

Figure 4: A bony ostium is fashioned in the nasal bone (in the lacrimal fossa) with one of the puncturing instruments. (Courtesy to Profes sor Dr. K. Abou-Sedira MD ).