1. Department of Family Medicine, Michigan State University, East Lansing, MI, USA
2. Department of Family Medicine, Sparrow Hospital, Lansing, MI, USA
3. Department of Obstetrics, Gynecology, and Reproductive Biology, Michigan State University, East Lansing, MI, USA
4. Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
5. Department of Medicine, Michigan State University, East Lansing, MI, USA