GowansEMSFraserCG. Biological variation of serum and urine creatinine and creatinine clearance: Ramifications for interpretation of results and patient care. Ann Clin Biochem1988; 25: 259–63.
2.
Elion-GerritzenWE. Analytic precision in clinical chemistry and medical decisions. Am J Clin Pathol1980; 73: 183–90.
3.
PayneRB. Creatinine clearance: A redundant clinical investigation. Ann Clin Biochem1986; 23: 243–50.
4.
NussbaumSRZahradnikRJLavigneJRHighly sensitive two-site immunoradiometric assay of parathyrin, and its clinical utility in evaluating patients with hypercalcaemia. Clin Chem1987; 33: 1364–67.
5.
EvansRMCowperAJCHalkettJGunnIR. Intact molecule PTH: Suppression with a standard oral calcium load, and analysis of analytical and biological variation in healthy individuals. Ann Clin Biochem1988; 25: 176S–7S.