Collection, transport, and processing of blood specimens for coagulation testing and general performance of coagulation assays - Arkin, CF; Bowue, EJW; Carroll, JJ; Day, HJ; Joist, JH; Lenahan, JG; Marlar, RA; Triplett, DA
Approved guideline – Third Edition. Vol 18, No. 20; Dec 1998. Published by NCCLS, Wayne, USA.