- Patients with a history of clinically significant and/or currently relevant hematological, renal (including single kidney), hepatic, gastrointestinal, endocrine (except for current adequately treated hypo- or hyperthyroidism), pulmonary (excluding chronic bronchitis, mild emphysema or chronic obstructive pulmonary disease), dermatological, oncological, or neurological disease, excluding tardive dyskinesia but including all forms of epilepsy (febrile convulsions in childhood acceptable). The only patients with known prior malignant disease who are eligible are those with cured prior skin cancer (excluding melanoma). Controlled Type II diabetes (glucose < 180 mg/100 ml at screening and baseline with dietary or oral hypoglycemic treatment) will not be considered a significant medical illness and would not exclude a subject from the study - Patients with a history of significant cardiovascular disease or significant concurrent cardiovascular disease, including a history of uncontrolled hypertension (supine diastolic pressure >95 mm Hg and/or supine systolic pressure > 170 mm Hg with or without treatment)