Study To Evaluate the Status of Subjects That Discontinued Participation in a Qualifying Amgen Sponsored AMG 073 Study Due to Kidney Transplantation

A Retrospective Follow Up Study to Evaluate the Status of Subjects That Discontinued Participation in a Qualifying Amgen Sponsored AMG 073 Study Due to Kidney Transplantation

The purpose of this study is to collect local laboratory data on immunoreactive parathyroid hormone (iPTH), calcium and phosphorus levels and estimated glomerular filtration rate (GFR) at approximately 1 week, 1 month, 3 months, 6 months and 12 months after the kidney transplant.

Inclusion Criteria:

- Patients who withdrew from one of the qualifying studies (i.e. patient previously took part in an Amgen study investigating the drug AMG 073 and its effects on secondary hyperparathyroidism [HPT]; in particular parathyroid hormone [PTH], calcium and phosphorus levels in blood associated with kidney failure) due to kidney transplantation.

Exclusion Criteria:

- Patient has any kind of disorder that compromises the ability of the subject to give written informed consent