Exome sequencing can misread high variant allele fraction of somatic variants in UBA1 as hemizygous in VEXAS syndrome: a case report oleh Matheus V. M. B. Wilke, Eva Morava-Kozicz, Matthew J. Koster, Christopher T. Schmitz, Shannon Kaye Foster, Mrinal Patnaik, Kenneth J. Warrington, Eric W. Klee, Filippo Pinto e Vairo