Human immunodeficiency virus detection and differential leukocyte counts are accurate and safer with formaldehyde-fixed blood.
Kiessling AA, Crowell RC, Brettler D, Forsberg A, Wolf B. Human immunodeficiency virus detection and differential leukocyte counts are accurate and safer with formaldehyde-fixed blood. Blood. 1993 Feb 01; 81(3):864-5.