Essential Hypertension

• Gulf Shores, Alabama, United States
• Litchfield Park, Arizona, United States
• Mesa, Arizona, United States
• Scottsdale, Arizona, United States

• Seoul National University Hospital, Bundang — Sungnam, South Korea

• Severance Hospital — Seoul, South Korea

• Huntsville, Alabama, United States
• Chandler, Arizona, United States
• Mesa, Arizona, United States
• Tempe, Arizona, United States

• Birmingham, Alabama, United States
• Huntsville, Alabama, United States
• Mesa, Arizona, United States
• Phoenix, Arizona, United States

• Investigative Site — Zanesville, Ohio, United States
• Investigative Site — Frankfurt, Germany
• Investigative Site — Valencia, Spain

• Department of Medical Research, Holstebro Hospital — Holstebro, Denmark

• Ambulatorio Ipertensione e Unità Coronarica Federico II University — Naples, Italy

• Catholic University of Leuven - Laboratory of Hypertension, Dept. of Molecular and Cardiov. Research - Campus Gasthuisberg — Leuven, Belgium

Not specified