1. Specimen collection, storage, and transportation to the laboratory for hematological tests;Tatsumi;Int J Hematol,2002
2. Procedures for the collection of diagnostic blood specimens by venipuncture. Approved standard;CLSI,2007
3. Tubes and additives for venous blood specimen collection. Approved standard;NCCLS,2003
4. Specimen collection, handling, storage and variability;Van Assendelft,1995
5. ICSH recommendation for blood specimen collection for hematological analysis;Tatsumi;Lab Hematol,2002