Evaluation of a soluble tetrazolium/formazan assay for cell growth and drug sensitivity in culture using human and other tumor cell lines - Scudiere, D A; Shoemaker, R H; Paul, K D; Monks, A; Tierney, S; Nofziger, T H; Currens, M J; Seniff, D; Boyd, M R (Cancer Res, 1988)