1. Department of StatisticsKansas State University 101 Dickens Hall Manhattan, Kansas 66506 U.S.A.
2. Department of Epidemiology and BiostatisticsMichigan State University B601 West Fee Hall East Lansing, Michigan 48824 U.S.A.
3. Departments of Biostatistics & Medical Informatics and StatisticsUniversity of Wisconsin‐Madison 600 Highland Ave., Madison, Wisconsin 53792 U.S.A.