Does a Delay in Performing an Activated Clotting (ACT) Test Really Matter? A Study in Nonheparinized Blood and a Single ACT MachineBridget M. Philip, John G. Brock-Utne, Harry J.M. Lemmens, Richard A. Jaffe and Paul E. ShuttleworthJ Extra Corpor Technol, 40 3 (2008) 193-195DOI: https://doi.org/10.1051/ject/200840193