1 Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA.
2 Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA; Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA.
3 Direct Consulting and Logistics, Abuja, Nigeria.
4 Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA.
5 Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA; Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston 77030, TX, USA. Electronic address: [email protected].