1327Factors associated with optimizing empiric antibiotic therapy in six hospitals. (December 2014) - Morgan, Daniel; Braykov, Nikolay; Schweizer, Marin; Uslan, Daniel Z.; Kelesidis, Theodoros; Weisenberg, Scott a.; Johannsson, Birgir; Young, Heather; Cantey, Joseph; Perencevich, Eli; Septimus, Edward; Laxminarayan, Ramanan