inclusion criteria: males and females who are at least 65 years of age at time of enrollment good general health * clinical screening laboratory evaluations (white blood cell (wbc), hemoglobin (hgb), platelets (plts), alanine transaminase (alt), aspartate transaminase (ast), creatinine (cr), alkaline phosphatase (alp), total bilirubin (t. bili), prothrombin time (pt), and partial thromboplastin time (ptt)) are within acceptable normal reference ranges at the clinical laboratory being used. normal ekg available for the duration of the study peripheral veins suitable for blood draw able to provide consent

inclusion criteria: males and females who are at least 65 years of age at time of enrollment good general health * clinical screening laboratory evaluations (white blood cell (wbc), hemoglobin (hgb), platelets (plts), alanine transaminase (alt), aspartate transaminase (ast), creatinine (cr), alkaline phosphatase (alp), total bilirubin (t. bili), prothrombin time (pt), and partial thromboplastin time (ptt)) are within acceptable normal reference ranges at the clinical laboratory being used. normal ekg available for the duration of the study peripheral veins suitable for blood draw able to provide consent

inclusion criteria: 1. males and females who are at least 65 years of age at time of enrollment 2. good general health * 3. clinical screening laboratory evaluations (white blood cell (wbc), hemoglobin (hgb), platelets (plts), alanine transaminase (alt), aspartate transaminase (ast), creatinine (cr), alkaline phosphatase (alp), total bilirubin (t. bili), prothrombin time (pt), and partial thromboplastin time (ptt)) are within acceptable normal reference ranges at the clinical laboratory being used. 4. normal ekg 5. available for the duration of the study 6. peripheral veins suitable for blood draw 7. able to provide consent

inclusion criteria: 1. males and females who are at least 65 years of age at time of enrollment 2. good general health * 3. clinical screening laboratory evaluations (white blood cell (wbc), hemoglobin (hgb), platelets (plts), alanine transaminase (alt), aspartate transaminase (ast), creatinine (cr), alkaline phosphatase (alp), total bilirubin (t. bili), prothrombin time (pt), and partial thromboplastin time (ptt)) are within acceptable normal reference ranges at the clinical laboratory being used. 4. normal ekg 5. available for the duration of the study 6. peripheral veins suitable for blood draw 7. able to provide consent