1 Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA.
2 Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA.
3 Women's Health Research Center, Mayo Clinic, Rochester, MN, USA; Department of Surgery, Mayo Clinic, Rochester, MN, USA; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN, USA.
4 Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA; Department of Neurology, Mayo Clinic, Rochester, MN, USA; Women's Health Research Center, Mayo Clinic, Rochester, MN, USA. Electronic address: rocca@mayo.edu.