1. Adult rhinosinusitis defined;Lanza;Otolaryngol Head Neck Surg,1997
2. Clinical practice guideline: adult sinusitis;Rosenfeld;Otolaryngol Head Neck Surg,2007
3. Summary health statistics for U.S. adults: National Health Interview Survey, 2008;Pleis;Vital Health Stat 10,2009
4. National Ambulatory Medical Care Survey: 2006 summary;Cherry;Natl Health Stat Report,2008
5. Ambulatory surgery in the United States, 2006;Cullen;Vital Health Stat,2009