Table 1.

Search strategy for identifying related articles in Medline.

No. 1	Pediatric OR paediatric OR infant* OR child OR children [All]
No. 2	Mechanical ventilation [All]
No. 3	Assisted ventilation [All]
No. 4	No. 2 OR No. 3
No. 5	Diaphragm electromyography [All]
No. 6	Diaphragmatic electromyography [All]
No. 7	Electrical activity diaphragm [All]
No. 8	Diaphragm* function [All]
No. 9	Respiratory muscle monitoring [All]
No. 10	No. 5 OR No. 6 OR No. 7 OR No. 8 OR No. 9
No. 11	No. 1 AND No. 4 AND No. 10

No limits were set for the time period or the language of publication.