The final diagnosis of pneumonia was made by pediatricians based on clinical
presentations, signs and symptoms such as cough, dyspnea, tachypnea, rales or crackles
on auscultation and/or decreased breathing sounds, fever with or without chills, chest
and/or abdominal pain, abnormal oxygen saturation, laboratory and instrumental tests,
CR findings (without LUS findings) and course compatible with pneumonia defined
according to BTS guidelines