Tsangaris, I. Plachouras, D. Kavatha, D. Gourgoulis, G.M. Tsantes, A. Kopterides, P. Tsaknis, G. Dimopoulou, I. Orfanos, S. Giamarellos-Bourboulis, E. Giamarellou, H. Armaganidis, A., Diagnostic and prognostic value of procalcitonin among febrile critically ill patients with prolonged ICU stay, BMC Infectious Diseases, (9), 2009, 1471-2334