Here are two informative specimen management links…
…I learned about through a message from Mike Collins, BMS3, Clinical Biochemistry and Haematology, Norfolk and Norwich Hospital, Colney Lane Norwich NR4 7UY posted on the Medlab_L bulletin board:
The World Health Organization pamphlet: Use of Anticoagulants in Diagnostic Laboratory Investigations and Stability of Blood, Plasma and Serum Samples.
a Chronolab interactive database: The Quality of Diagnostic Samples.
I hope you will find these helpful. Geo.