In Mohamed et al., the primary objective was to evaluate tau accumulation, using the PET ligand [18F]AV1451 (flortaucipir), in the brains of cognitively normal male Vietnam war veterans who had a history of moderate/severe non-penetrating TBI and/or PTSD compared to Vietnam war veterans with no history of TBI and/or PTSD. Here, MAPT is linked to post-traumatic stress disorder.