[1] Med Univ South Carolina, Coll Med, Charleston, SC USA
[2] Med Univ South Carolina, Dept Otolaryngol Head & Neck Surg, Charleston, SC USA
[3] Med Univ South Carolina, Dept Ophthalmol, Charleston, SC USA
[4] Med Univ South Carolina, Dept Otolaryngol Head & Neck Surg, 135 Rutledge Ave, MSC 550, Charleston, SC 29425 USA