| Affiliation: | 1. University of North Carolina Chapel Hill, Department of Statistics and Operations Research, 318 Hanes Hall, CB #3260, Chapel Hill, NC 27599-3260, United States of America;2. University of North Carolina Chapel Hill, Department of Emergency Medicine, 170 Manning Dr., CB #7594, Chapel Hill, NC 27599-7594, United States of America;3. Roundtable Analytics Inc., 1100 Larkspur Landing Cir., Ste 101, Larspur, CA 94939, United States of America;4. University of North Carolina Chapel Hill, School of Nursing, Carrington Hall, CB# 7460, Chapel Hill, NC 27599-7460, United States of America |
