1. Department of Otolaryngology Head and Neck Surgery; Northwestern University; 303 E. Chicago Ave., Searle 12-561 Chicago 60611 Illinois
2. Department of Cell and Molecular Biology; Northwestern University Feinberg School of Medicine; Chicago 60611 Illinois
3. Advanced Photon Source; Argonne National Laboratory; 9700 South Cass Ave. Argonne 60439 Illinois
4. Department of Biomedical Engineering; Northwestern University; 2145 Sheridan Road, Tech E310 Evanston 60208 Illinois
5. The Hugh Knowles Center, Department of Communication Sciences and Disorders; Northwestern University, Frances Searle Building; 2240 Campus Drive Evanston 60208 Illinois