Naraghi,M , , Amidi,Y , and Eslamifar,A . "Detection of Bacterial Biofilm in Human Refractory Chronic Rhinosinusitis with Scanning Electron Microscopy (SEM)", Iranian Journal of Otorhinolaryngology, 18, 4, 2007, 181-184. doi: 10.22038/ijorl.2007.2821