For example, Pascoal, Mathotaarachchi, Shin, et al. (2017) showed that being positive for both amyloid‐β‐PET and CSF phosphorylated‐tau (P‐tau) was associated greater cognitive decline and greater risk of disease progression in people with MCI, than being positive for either biomarker in isolation. The gene discussed is MAPT; the disease is Mental deterioration.