Closed for Enrollment

• Establishment of Disease Ranges of Selected Markers and Ratios for the Detection of OTC Deficiency and CPS Deficiency using Newborn Blood Spots Rochester, Minn.

  The purpose of this study is to obtain and analyze existing newborn screening data from previously identified patients with a confirmed diagnosis of a urea cycle disorder (UCD) (when all necessary analytes were measured by the state laboratories) OR collect and analyze dried blood spots from newborn screening cards of previously identified patients with a confirmed diagnosis of a urea cycle disorder (UCD).