P2‐310: Improving synaptic plasticity and cognitive function in rodents by the novel phosphodiesterase 9A inhibitor bi 409306. (1st July 2015) - Rosenbrock, Holger; Marti, Anelise; Koros, Eliza; Runge, Frank; Fuchs, Holger; Giovannini, Riccardo; Dorner-Ciossek, Cornelia