Unravelling the complexity of ventilator associated pneumonia: a systematic methodological literature review of diagnostic criteria and definitions used in clinical research Critical Care Springer Nature Link International ERS ESICM ESCMID ALAT guidelines for the management of hospital acquired pneumonia and ventilator associated pneumonia European Respiratory Society Diagnosis, management and treatment of nosocomial pneumonia in ICU Serene Hospital Acquired and Ventilator Associated Pneumonia Oncohema Key Ventilator Associated Pneumonia (VAP) Time of Care Everything You Need To Know About the New ATS IDSA Community Acquired Pneumonia Guidelines FOAMid