1. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
2. Department of Obstetrics and Gynecology, Division of midwifery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
3. Department of sleep disorders, Cleveland Clinic Sleep Disorders Center, Cleveland, OH
4. Department of Child and Family Studies, University of South Florida, Tampa