From the Solve ME/CFS Initiative: We recently highlighted a paper published online on October 17, 2016 (doi: 10.1038/ng.3696) the journal Nature Genetics, one of the most rigorous publications in the field of genetics with tantalizing findings. The paper, titled “Elevated basal serum tryptase identifies a multisystem disorder associated with increased TPSAB1 copy number,” had two key features that could be potentially relevant to ME/CFS: