Compare the Efficacy of Cinacalcet vs Traditional Vitamin D for Secondary Hyperparathyroidism (SHPT) Among Subjects Undergoing Hemodialysis

The purpose of this study is to determine the efficacy of treatment with cinacalcet to manage plasma parathyroid levels as to compared traditional vitamin D therapy, whether given orally or intravenously, among hemodialysis subjects with secondary hyperparathyroidism when the doses are adjusted appropriately to maintain serum calcium and phosphorous levels with currently recommended ranges.