1 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois St., San Francisco, CA 94158-2519.
2 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco School of Medicine, 499 Illinois St., San Francisco, CA 94158-2519. Electronic address: eleni.jaswa@ucsf.edu.
3 Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA.
4 Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA.