[1] Oregon Hlth & Sci Univ, Dept Ophthalmol, Portland, OR 97239 USA
[2] Oregon Hlth & Sci Univ, Dept Otolaryngol Head & Neck Surg, Portland, OR 97239 USA
[3] Oregon Hlth & Sci Univ, Dept Publ Hlth & Prevent Med, Portland, OR 97239 USA
[4] Oregon Hlth & Sci Univ, Div Infect Dis, Portland, OR 97239 USA