Estimating the richness of a population when the maximum number of classes is fixed: a nonparametric solution to an archaeological problem.

Estimating assemblage species or class richness from samples remains a challenging, but essential, goal.Though a variety of statistical tools for estimating species or class richness have been developed, they are all singly-bounded: assuming only a lower bound of species or Vinpocetine classes.Nevertheless there are numerous situations, particularl

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Tissue expression of squamous cellular carcinoma antigen and Ki67 in hepatocellular carcinoma-correlation with prognosis: A historical prospective study

DMAE Abstract Background Squamous cellular carcinoma antigen (SCCA) is overexpressed in hepatocellular carcinoma (HCC) tissue and in sera of HCC patients.Our aim was to assess hepatic SCCA immunostaining in a series of HCCs and to correlate its presence with cell proliferation, apoptosis and clinical outcome.Methods Sixty-one HCC patients were incl

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