ORIGINAL RESEARCH
Clinical and laboratory predictors of severe community-acquired pneumonia in children under four years of age
1 Pediatric Research and Clinical Center of Infectious Diseases of the Federal Medical Biological Agency, Saint Petersburg, Russia
2 Saint Petersburg State Pediatric Medical University, Saint Petersburg, Russia
3 Mechnikov North-Western State Medical University, Saint Petersburg, Russia
Correspondence should be addressed: Evgeny A. Kozyrev
Professora Popova, 9, Saint Petersburg, 197022, Russia; ur.liam@aynehz_veryzok
Author contribution: Kozyrev EA — patient enrollment, literature review, data processing, manuscript writing; Babachenko IV — study planning, data processing, manuscript editing; Orlov AV — patient enrollment, manuscript editing; Martens EA, Nikitina EV — laboratory tests, manuscript editing; Tian N, Orlova ED — patient enrollment, manuscript editing.
Compliance with ethical standards: the study was approved by the Ethics Committee of the Pediatric Research and Clinical Center for Infectious Diseases of FMBA of Russia (protocol № 141 dated 03 December 2020) and the Ethics Committee of the St.Olga City Children's Hospital (protocol № 55 dated 30 March 2021). The informed consent in clinical research was obtained in all cases.