Study of Safety and Efficacy of Doxercalciferol in Patients With Chronic Kidney Disease, Stage 3 or 4, and Secondary Hyperparathyroidism

University of Rochester Medical Center, Rochester

DaVita Lewiston Dialysis Center, Lewiston

George Washington University Hospital, Washington D.C.

Georgia Kidney Associates, Inc., Marietta

Nephrology Associates, Palm Beach Gardens

Discovery Medical Research Group, Ocala

Michigan Kidney Consultants, P.C., Pontiac

Twin Cities Clinical Research, Brooklyn Center

Altru Health System Research Center, Grand Forks

AKDHC Medical Research Services, Phoenix

Apex Research of Riverside, Riverside

UCLA Diabetes Reseach Center, Alhambra

Montefiore Medical Center, The Bronx

Wake Nephrology Associates, PA, Raleigh

Wake Forest University School of Medicine, Winston-Salem

Temple University, Philadelphia

Virginia Commonwealth University, Richmond

Instituto Renal del Este, Caguas

Jose Cangiano, MD, San Juan