1. Tatsumi N, Miwa S, Lewis SM. International Council for Standardization in Haematology/International Society of Hematology 2002 Specimen collection, storage, and transportation to the laboratory for hematological tests. International Journal of Hematology 75:261-268.
2. NCCLS 2003 Procedures for the collection of diagnostic blood specimens by venipuncture. Approved standard, 5th edition. H3-A5. NCCLS, Wayne PA.
3. NCCLS 2003 Tubes and additives for venous blood specimen collection. Approved standard, 5th edition. NCCLS, Wayne PA.
4. Specimen collection, handling, storage and variability;Van Assendelft,1995
5. ICSH recommendation for blood specimen collection for hematological analysis;Tatsumi;Laboratory Hematology,2002