Gene expression clustergram of 70 high-risk genes in plasma cells from 22 healthy subjects (NPC), 14 subjects with MGUS, 351 patients with newly diagnosed MM, and 42 human MM cell lines (HMCL). Each row represents a gene and each column represents a sample. The genes are ordered from top to bottom based on the rank in Table 1. Red color for a gene indicates expression above the median and blue color indicates expression below the median. Samples within myeloma risk groups were ordered so that the predicted risk increases continuously from left to right.