Authors: Villarino, ME Brennan, MJ Nolan, CM Catanzaro, A Lundergan, LL Bock, NN Jones, CL Wang, YC Burman, WJ

Citation: Me. Villarino et al., Comparison testing of current (PPD-SI) and proposed (PPD-S2) reference tuberculin standards, AM J R CRIT, 161(4), 2000, pp. 1167-1171