1. tracheomalac$.mp.

2. tracheo‐malac$.mp.

3. (trache$ adj5 malac$).mp.

4. malacia$.mp.

5. exp Tracheal Diseases/dt, su, th [Drug Therapy, Surgery, Therapy]
6. exp TRACHEA/ab, su [Abnormalities, Surgery]
7. exp BRONCHI/ab [Abnormalities]
8. (trache$ adj5 abnormal$).mp.

9. or/1‐8

10. ADOLESCENT/ or exp CHILD/ or exp INFANT/ or exp PEDIATRICS/

11. (child$ or paediat$ or pediat$ or adolesc$ or infan$ or toddler$ or bab$ or young$ or preschool$ or pre school$ or pre‐school$ or newborn$ or new born$ or new‐born$ or neo‐nat$ or neonat$).mp.

12. 10 or 11

13. 9 and 12

1. tracheomalac$.mp.
2. tracheo‐malac$.mp.
3. (trache$ adj5 malac$).mp.
4. malacia$.mp.
5. (trache$ adj5 abnormal$).mp.
6. exp TRACHEOMALACIA/
7. or/1‐6
8. exp pediatrics/
9. exp CHILD/ or exp INFANT/ or exp ADOLESCENT/
10. (child$ or paediat$ or pediat$ or adolesc$ or infan$ or toddler$ or bab$ or young$ or preschool$ or pre school$ or pre‐school$ or newborn$ or new born$ or new‐born$ or neo‐nat$ or neonat$).mp.
11. 8 or 9 or 10
12. 7 and 11