JAK2 and myeloproliferative neoplasm: Sensitivity analyses removed individuals with mCAs spanning the JAK2 region (N = 550), a region frequently impacted by mCAs in MPNs15–18, and still observed a positive phenotypic association between autosomal mCAs and MPN, though the association was attenuated (T-statistic = 15.53, P = 2.39 × 10−54).