References
- Hyltoft Petersen P, Blaabjerg 0, Irjala K. Asses-sing quality in measurement of plasma proteins. Nordkem Publications; 1994.
- International Federation of Clinical Chemistry, Expert Panel on Theory of Reference Values: Approved recommendation on the theory of reference values. Part 1. The concept of reference values. J Clin Chem Clin Biochem 1987; 25: 337 — 42. Part 2. Selection of individuals for the production of reference values. J Clin Chem Clin Biochem 1987; 25: 639-44. Part 3. Preparation of individuals and collection of specimens for the production of reference values. J Clin Chem Clin Biochem 1988; 26: 593-8. Part 4. Control of analytical variation in the production, transfer and application of reference values. Eur J Clin Chem Clin Biochem 1991; 29: 531-5. Part 5. Statistical treatment of collected reference values. Determi-nation of reference limits. J Clin Chem Clin Biochem 1987; 25: 645-56. Part 6: Presentation of observed values related to reference values. J Clin Chem Clin Biochem 1987; 25: 657–62
- Nordin G. Reference intervals for haematology properties in blood of adult women and men: part of the Nordic Reference Interval Project. Scand J Clin Lab Invest 2004; 64: 385–98.
- Rustad P. Nordic Reference Interval Project. http://www.furst.no/norip/
- Rustad P, Felding P, Hyltoft Petersen P. Descrip-tive analytical data and consequences for calcula-tion of common reference intervals in the Nordic Reference Interval Project 2000. Scand J Clin Lab Invest 2004; 64: 343–70.
- Felding P, Rustad P, Martensson A, Kairisto V, Franzson L, Hyltoft Petersen P, Uldall A. Reference individuals, blood collection, treatment of samples and descriptive data from the ques-tionnaire in the Nordic Reference Interval Project 2000. Scand J Clin Lab Invest 2004; 64: 327–42.
- Henriksen GM, Pedersen MM, Norgaard I, Blom M, Blou L, Blaabjerg O, Uldall A. Minimally Processed fresh frozen human reference sera. Preparation, testing, and application to interna-tional external quality assurance. Scand J Clin Lab Invest 2004; 64: 293–308.
- Stromme JH, Rustad P, Steensland H, Theodosen L, Urdal P. Reference intervals for eight enzymes in blood of adult women and men measured in accordance with the IFCC reference system at 37°C: part of the Nordic Reference Interval Project, Scand J Clin Lab Invest 2004; 64: 371— 84.
- Ornemark U. IMEP-17 Trace and minor consti-tuents in human serum. Certification report, internal report GE/R/IM/36/01 (EUR 20243 EN), IRMM, Geel: September 2002.
- Pedersen MM, Ornemark U, Rustad P, Steensland H, Loikkanen M, Olafsdottir E, Henriksen GM, Jorgensen N, Uldall A, Nordin G, Nordberg UR. The Nordic Trueness Project 2002: use of reference measurement procedure values in a general clinical chemistry survey. Scand J Clin Lab Invest 2004; 64: 309 — 20.
- Solberg HE. RefVal: a program implementing the recommendations of the International Federation of Clinical Chemistry on the statistical treatment of reference values. Comput Meth Progr Biomed 1995; 48: 247–56.
- Lahti A, Hyltoft Petersen P, Boyd JC, Fraser CG, Jorgensen N. Objective criteria for partitioning Gaussian-distributed reference values into sub-groups. Clin Chem 2002; 48: 338–52.
- Pedersen MM, Rustad P, Simonsson P. Certificate of analysis: NFKK Reference Serum X: a reprint. Scand J Clin Lab Invest 2004; 64: 321–26.
- Lahti A, Hyltoft Petersen P, Boyd JC. Impact of subgroup prevalences on partitioning of Gaussian-distributed reference values. Clin Chem 2002; 48: 1987–99.
- Lahti A. Are the common reference intervals truly common? Case studies on stratifying biochemical reference data by countries using two partitioning methods. Scand J Clin Lab Invest 2004; 64: 407–30.
- Rustad P, Hyltoft Petersen P. Effect of analytical quality on establishing the common reference intervals and their use. Scand J Clin Lab Invest 2004; 64: 399–406.
- Tietz textbook of clinical chemistry. 3rd ed. Philadelphia, Pa.: Saunders Company; 1999
- Laurell's clinical chemistry in medical praxis. 6th ed. Lund, Sweden: Studentlitteratur; 1991 (in Swedish)