Inclusion and exclusion criteria
cough, CF, allergies, acute illness
ALLERGIC BRONCHOPULMONARY ASPERGILLOSIS, TUBERCULOSIS, ALLERGIES
All individuals aged 6 and above, who sought care at the Pulmonology Clinic of Mofid Children's Hospital for CF, received a diagnosis from a specialized pediatric pulmonologist. Participation in the research was contingent upon obtaining informed consent from both the parents of children and children themselves, provided they were older than 6 years. Exclusions encompassed CF patients below 6 years old, those necessitating hospitalization due to exacerbation (characterized by increased cough and sputum), individuals with underlying conditions like allergic bronchopulmonary aspergillosis or tuberculosis, those who experienced another acute illness during treatment, individuals with allergies to any CHS components, those who voluntarily opted out of the study, and patients unable to cooperate with the FeNO test.