| Outcome Measures: |
Primary: Change in c-terminal FGF23 measurements, longitudinal change in plasma c-terminal FGF23 (RU/ml) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Intact FGF23 measurements, longitudinal change in plasma intact FGF23 (pg/ml) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months | Secondary: Change in Parathyroid Hormone, longitudinal change in Serum Parathyroid Hormone (pg/ml) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Phosphate (mg/dl), longitudinal change in Plasma Phosphate (mg/dl) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Serum creatinine, longitudinal change in Serum creatinine (mg/dl) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in 1,25 dihydroxyvitamin D, longitudinal change in 1,25 dihydroxyvitamin D (pg/ml) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in C-reactive protein, longitudinal change in C-reactive protein (mg/L) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Ferritin Measurement, longitudinal change in serum ferritin (ng/ml) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Iron Measurement, longitudinal change in Serum iron (ug/dl) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Transferrin Saturation, longitudinal change in Transferrin Saturation (%) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months|Change in Hemoglobin Measurement, longitudinal change in Serum hemoglobin (g/dl) over 6 weeks and 3 months, Weekly x 6 weeks, 1 longitudinal measurement at 3 months
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