1 Department of Internal Medicine, Texas Tech University Health Science Center, Lubbock, TX 79430-6252, USA; Department of Cell Biology, Texas Tech University Health Science Center, Lubbock, TX 79430-6252, USA. Electronic address: pmichaelconn@gmail.com.
2 Division of Reproductive Health, Research Center for Population Health, National Institute of Public Health, SSA, México, D.F., Mexico.
3 Department of Internal Medicine, Texas Tech University Health Science Center, Lubbock, TX 79430-6252, USA; Department of Cell Biology, Texas Tech University Health Science Center, Lubbock, TX 79430-6252, USA.