1. College of Nursing, Texas Woman’s University, Dallas, TX 75235, USA
2. Greene Center for Reproductive Biology, UT Southwestern, Dallas, TX 75390, USA
3. Center for Research Design and Analysis, Texas Woman’s University, Denton, TX 76204, USA
4. Department of Family Medicine and Public Health Sciences, Wayne State University, Detroit, MI 48202, USA
5. Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI 48823, USA
6. College of Nursing, University of Central Florida, Orlando, FL 32816, USA