Comparison of the efficacy of colistin monotherapy and colistin combination therapies in the treatment of nosocomial pneumonia and ventilator-associated pneumonia caused by Acinetobacter baumannii. - Kara, I.; Yildirim, F.; Bilaloglu, B.; Karamanlioglu, D.; Kayacan, E.; Dizbay, M.; Turkoglu, M.; Aygencel, G. (Southern African Journal of Critical Care, 2015)