28 CFR §79.67

1. (a)In determining whether a claimant developed chronic renal disease following pertinent employment as an ore transporter, the Assistant Director shall resolve all reasonable doubt in favor of the claimant. A conclusion that a claimant developed chronic renal disease must be supported by medical documentation.
2. (b)A claimant or beneficiary may submit any of the following forms of medical documentation in support of a claim that the claimant contracted chronic renal disease.
   1. (1)Pathology report of tissue biopsy;
   2. (2)If laboratory or radiographic tests exist:
      1. (i)Abnormal plasma creatinine values;
      2. (ii)Abnormal glomerular filtration rate (by either measured creatinine or iothalamate clearance or calculated by MDRD equation); and
      3. (iii)Renal tubular dysfunction as evidenced by:
         1. (A)Glycosuria in the absence of diabetes mellitus;
         2. (B)Proteinuria less than one gram daily without other known etiology; or
         3. (C)Hyperphosphaturia, aminoaciduria, B-2 microglobinuria or alkaline phosphaturia or other marker of proximal tubular injury; or
      4. (iv)Radiographic evidence of chronic renal disease;
   3. (3)Autopsy report;
   4. (4)Physician summary report;
   5. (5)Hospital discharge summary report;
   6. (6)Hospital admitting report; or
   7. (7)Death certificate, provided that it is signed by a physician at the time of death.