Article 7 crackle human 7 oxygen saturation 5 thorax radiography 5 adult 4 case report 4 clinical article 4 female 4 fever 4 male 4 physical examination 4 abnormal respiratory sound 3 computer assisted tomography 3 dyspnea 3 leukocyte count 3 lung auscultation 3 Humans 2 Infant 2 Pneumonia 2 Respiratory Sounds 2 aged 2 antibiotic agent 2 body weight loss 2 chest infection 2 clinical outcome 2 cohort analysis 2 controlled study 2 coughing 2 diagnostic imaging 2