[1] Univ Chicago, Pritzker Sch Med, Div Biol Sci, Chicago, IL 60637 USA
[2] Univ Chicago, John Crerar Lib, Chicago, IL 60637 USA
[3] Univ Chicago, Dept Surg, Sect Otolaryngol Head & Neck Surg, Chicago, IL 60637 USA
[4] Carthage Coll, Dept Psychol Sci, Kenosha, WI 53140 USA
[5] Univ Chicago, Pritzker Sch Med, Chicago, IL 60637 USA