1. Penn State College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, USA.
2. Department of Family and Community Medicine, Penn State College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, USA.
3. Department of Family and Community Medicine, Penn State College of Medicine, The Pennsylvania State University, State College, Pennsylvania, USA.
4. Department of Obstetrics and Gynecology, Penn State College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, USA.
5. Department of Family and Community Medicine, Penn State College of Medicine, The Pennsylvania State University, Reading, Pennsylvania, USA.