Renal Insufficiency, Chronic

• Western Nephrology & Metabolic Disease — Arvada, Colorado, United States
• Complete Renal Care — Denver, Colorado, United States
• Pines Clinical Research — Pembroke Pines, Florida, United States
• University of Kansas Medical Center — Kansas City, Kansas, United States

• Seoul National University Hospital — Seoul, South Korea

• Clinical Research Center — Birmingham, Alabama, United States
• Gadsden Dialysis — Gadsden, Alabama, United States
• Holy Cross Renal Care — Mission Hills, California, United States
• Nephrology Educational Services and Research — Tarzana, California, United States

• Mobile, Alabama, United States
• Riverside, California, United States
• Greenwood Village, Colorado, United States
• Berwyn, Illinois, United States

• St. Paul's Hospital — Vancouver, British Columbia, Canada

Not specified

• Medical Research — Holstebro, Denmark

• Site Reference ID/Investigator# 57348 — Al'met'yevsk, Russia
• Site Reference ID/Investigator# 57347 — Cheboksary, Russia
• Site Reference ID/Investigator# 58347 — Chelyabinsk, Russia
• Site Reference ID/Investigator# 67404 — Iakutsk, Russia

Not specified

• Department of Renal Medicine, Aarhus University Hospital, Skejby — Aarhus N, Denmark