Hypertension due to cancer, history of heart or circulatory problems

History of mental disorder that might impair sexual function

History or presence of drug or alcohol abuse

Prior surgery for erectile dysfunction or other urological procedure

No penile implant or assist devices

History of chronic liver disease, history of diabetes

History of severe life-threatening diseases such as, cancer, AIDS or positive HIV test

Subjects with only 1 kidney

Mental handicap or legal incapacity

Health Assessment Study (0954-946)