1. Department of Clinical Science , Kaiser Permanente Bernard J. Tyson School of Medicine , Pasadena , CA , USA
2. Department of Emergency Medicine, Southern California Permanente Medical Group, Department of Clinical Science , Kaiser Permanente Bernard J. Tyson School of Medicine , Pasadena , CA , USA
3. Department of Obstetrics & Gynecology, Southern California Permanente Medical Group Kaiser Permanente West Los Angeles Medical Center , Los Angeles , CA , USA
4. Kaiser Permanente Bernard J. Tyson School of Medicine , Pasadena , CA , USA
5. Department of Family Medicine, Southern California Permanente Medical Group, Department of Clinical Science , Kaiser Permanente Bernard J. Tyson School of Medicine , Pasadena , CA , USA