Acute Disease|Algorithms|Databases, Nucleic Acid|Discriminant Analysis|Gene Expression Profiling|Humans|Leukemia, Myeloid|Models, Genetic|Models, Statistical|Oligonucleotide Array Sequence Analysis|Precursor Cell Lymphoblastic Leukemia-Lymphoma|Predictive Value of Tests|Reproducibility of Results|Sample Size|Sensitivity and Specificity|Sequence Analysis, DNA|Stochastic Processes