1. Donald W. Reynolds Department of Geriatric Medicine Reynolds Oklahoma Center on Aging University of Oklahoma Health Sciences Center Oklahoma City OK 73104 USA
2. Department of Neurosurgery and Szentagothai Research Center Medical School University of Pecs Pecs 7624 Hungary
3. Department of Physiology University of Oklahoma Health Sciences Center 940 S.L. Young Blvd. Rm. 653 Oklahoma City 73104OK USA
4. Division of Clinical Pharmacology Vanderbilt University Medical Center D‐3100 Medical Center North Nashville TN USA
5. Department of Medical Physics and Informatics Faculty of Medicine and Faculty of Science and Informatics University of Szeged Szeged 6720Hungary
6. The Peggy and Charles Stephenson Cancer Center University of Oklahoma Health Sciences Center Oklahoma City OK 73104 USA
7. Department of Pulmonology 1125 Budapest, Diós árok 1/c Semmelweis University Budapest Hungary