1. Wisconsin School of Business University of Wisconsin‐Madison 975 University Avenue, 5287 Grainger Hall Madison Wisconsin53706 USA
2. Emory University 1300 Clifton Road Atlanta Georgia30322USA
3. University of North Carolina at Chapel Hill Campus Box 3490, McColl Building Chapel Hill North Carolina27599‐3490USA
4. School of Medicine and Public Health University of Wisconsin‐Madison 800 University Bay Drive, Suite 300 Madison Wisconsin53705 USA