Use of ‘Quality Control Master Charts’ in the Routine Laboratory

Stamm D. Guidelines for a basic programme for internal quality control of quantitative analyses in clinical chemistry. WHO 1981; Lab/81.3.

Grannis GF . Studies of the reliability of constituent target values established in a large inter-laboratory survey. Clin Chem 1976; 22: 1027–36.

Bacchus RA Bullock DG Noy GA Whitehead TP . The Middle East external quality assessment scheme for clinical chemistry. Ann Clin Biochem 1988; 25: 560–68.

Grannis GF Grumer HD Lott JA Edison JA McCabe WC . Proficiency evaluation of clinical chemistry laboratories. Clin Chem 1972; 18: 222–36.