Noordhoek, G.T., Kolk, A.H., Bjune, G., Catty, D., Dale, J.W., Fine, P.E., Godfrey-Faussett, P., Cho, S.N., Shinnick, T., Svenson, S.B., al., 1994. Sensitivity and specificity of PCR for detection of Mycobacterium tuberculosis: a blind comparison study among seven laboratories 32.