1. Department of Epidemiology and Biostatistics Arnold School of Public Health University of South Carolina Columbia SC USA
2. Rural and Minority Health Research Center Arnold School of Public Health University of South Carolina Columbia SC USA
3. Department of Health Services Policy and Management Arnold School of Public Health University of South Carolina Columbia SC USA
4. Department of Health and Human Physiology University of Iowa Iowa City IA USA
5. Department of Epidemiology University of Iowa Iowa City IA USA
6. Maternal Fetal Medicine Prisma Health‐University of South Carolina Medical Group Columbia SC USA