1. Department of Pharmacology and ToxicologyCollege of MedicineUniversity of Arkansas for Medical SciencesLittle RockArkansasUSA
2. Department of AnesthesiologySchool of MedicineVanderbilt UniversityNashvilleTennesseeUSA
3. Department of Physiology and Biophysics and Department of PediatricsCollege of MedicineUniversity of Arkansas for Medical SciencesArkansas Children's Hospital Research InstituteLittle RockArkansasUSA