1. School of Information, University of Michigan, 105 South State Street, Ann Arbor, MI 48109, USA
2. Department of Information Science, College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania, USA
3. Department of Community Health and Prevention, Dornsife School of Public Health, Drexel University, Philadelphia, Pennsylvania, USA
4. Graduate School of Business Administration, Bar-Ilan University, Ramat-Gan, Israel