1. Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics & Clinical Epidemiology, Department of Family Medicine, and Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon (A.G.C.)
2. Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics & Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon (R.M.J., A.M.T., R.H., A.A., J.W., M.M.)
3. Department of Obstetrics and Gynecology and School of Nursing, Oregon Health & Science University, Portland, Oregon (E.L.T.)
4. Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon (A.C.H.).