Impact of availability of guidelines and active surveillance in reducing the incidence of ventilator-associated pneumonia in Europe and worldwide, Kaier, K., Lambert Marie-Laurence, Frank U. K., Vach W., Wolkewitz M., Tacconelli E., Rello J., Theuretzbacher U., and Martin M. , BMC.Infect.Dis., 12/4/2014, Volume 14, Issue 1, p.199, (2014)