Effects of systemic antibiotics in early onset ventilator-associated pneumonia in trauma patients: A single-centre retrospective cohort study. - Wong, Ching Yee; Ng, Yau Tak; Ching, Ka Chun; Ha, Pui Kwan; Leung, Chun Yu; Au, Wing Kiu; Lui, Chun Tat; Tsui, Kwok Leung (Hong Kong Journal of Emergency Medicine, 2023)