1 Department of Applied Health Science, School of Public Health - Bloomington, Indiana University, Bloomington, IN 47405, USA. cvorland@iu.edu.
2 Department of Applied Health Science, School of Public Health - Bloomington, Indiana University, Bloomington, IN 47405, USA. awb1@iu.edu.
3 Department of Epidemiology and Biostatistics, School of Public Health - Bloomington, Indiana University, Bloomington, IN 47405, USA. sd3@indiana.edu.
4 Department of Statistics, Columbia University, New York, NY 10027, USA. gelman@stat.columbia.edu.
5 Department of Epidemiology and Biostatistics, School of Public Health - Bloomington, Indiana University, Bloomington, IN 47405, USA. allison@iu.edu.