@article{article0447b655,
title   = {Differences in both matrix metalloproteinase 9 concentration and zymographic profile between plasma and serum with clot activators are due to the presence of amorphous silica or silicate salts in blood collection devices},
author = {Mannello, Ferdinando and Tanus-Santos, José Eduardo and Meschiari, Cesar A. and Tonti, Gaetana A.},
year = {2008},
doi = {10.1016/j.ab.2007.11.020},
journal   = {Analytical Biochemistry}
}