Why are microarrays not always effective in the detection of cancer

The chemistry of the microarray in itself is not new, since hybridization technology has been well established for decades. However, the simultaneous study of thousands of genes transforms the microarray technique into a powerful whole system analytical tool.

answer; polycythemia is the correct answer;

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.