Thelma Hackworth and Caryl Neal, as Natural Parents I Survivors for Carylette DeShun Neal v. Fresenius Medical Care North America, D/B/A/ Fresenius South Oak Cliff Dialysis Center And Jane/John Doe, Individually, and as Owners'/Employees' of Fresenius Medical Care North America, D/B/A/ Fresenius South Oak Cliff Dialysis Center