00457nam a22001097a 4500020002000000082001900020100006000039245005800099260004000157300003300197650011700230  a0471031852 (hb)  a610.15195bBIO  aGerald Van Belle aLloyd D. FisheraPatrick J. Heagerty  aBiostatistics ba methodology for the health sciences  aNew JerseybJohn Wiley & Sonsc2004  axi, 871 p.b: ill.c; 26 cm.  aBiostatistics aBiometryvDescriptive statisticsvCounting datavContingency tables vVariables vVariancevIIMC