Reduced cGMP levels in CSF of AD patients correlate with severity of dementia and current depression. Alzforum, 17 Mar 2017 Hesse R, Lausser L, Gummert P, Schmid F, Wahler A, Schnack C, Kroker KS, Otto M, Tumani H, Kestler HA, Rosenbrock H, von Arnim…