Erectile Dysfunction

• Radiant Research — Birmingham, Alabama, United States
• Genova Clinical Research — Tucson, Arizona, United States
• HealthStar Research — Hot Springs, Arkansas, United States
• Genesis Research International — Longwood, Florida, United States

• Research Site — Lincoln, Nebraska, United States

Not specified

Not specified

• For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician. — Huntsville, Alabama, United States
• For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician. — Little Rock, Arkansas, United States
• For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician. — Newport Beach, California, United States
• For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician. — Stuart, Florida, United States

• Greenbelt, Maryland, United States
• Woodlane, New Jersey, United States
• Greer, South Carolina, United States

Not specified

• Pfizer Investigational Site — Oslo, Norway
• Pfizer Investigational Site — Belfast, Northern Ireland, United Kingdom
• Pfizer Investigational Site — Leeds, WEST Yorkshire, United Kingdom

• Department of internal medicine University Federico II — Naples, Italy

• Pfizer Investigational Site — Singapore