Jack Semple is a Canadian blues singer and guitarist from Regina, Saskatchewan. Semple was the lead guitarist for The Lincolns for two years; he performs as a solo artist and with The Jack Semple Band, throughout Canada and in the United States.

If there is only a small number in the blood sample tested, then it is possible that the mutation will not be detected. The presence of other mutations can help confirm the diagnosis of an MPN. Recently, mutations in the CALR (calreticulin) gene have been

A few laboratories offer both a JAK2 V617F test that detects the mutation (qualitative) and a test that measures how many of cells in the sample have the mutation (quantitative). Some healthcare practitioners may order a quantitative test to monitor the c