Table A1.

Search protocol #.

Database	Search Strings	Hits
PubMed 1966 -	#1:(“Lung Volume Measurements”[Mesh]) OR (“Lung volume*” OR “Total lung capacity” OR “TLC” OR “Residual volume” OR “RV” OR “Total lung volume” OR “Functional residual capacity” OR “FRC” OR “Inspiratory lung volume” OR “Expiratory lung volume” OR “Lung-volume quantification” OR “end-inspiratory lung volume” OR “end-expiratory lung volume” OR “Lung volume measurement*” OR “Static lung volumes” OR “Lung Capacity”)	91782
	#2:(“Tomography, X-Ray Computed”[Mesh]) OR (“Computer tomography” OR “computer-assisted tomography” OR “Chest computed tomography” OR “CT” OR “Inspiration CT” OR “Expiration CT” OR “CT-derived lung volumes” OR “Multidetector Computed tomography” OR “computed tomography segmentation” OR “computed tomography” OR “Computerized tomography” OR “Volumetric chest CT” OR “CAT scan” OR “low-dose CT” OR “high-resolution CT” OR “tomodensitometry” OR “quantitative CT”)	903743
	#3:(“Plethysmography, Whole Body”[Mesh]) OR (“Body plethysmography” OR “plethysmography analysis” OR “plethysmographic” OR “plethysmographic methods” OR “Respiratory function tests” OR “Static spirometry” OR “Body box” OR “Plethysmograph*” OR “Whole Body Plethysmography” OR “Pulmonary function test*”)	80527
	#1 AND #2 AND #3	1405

Note: Protocol 1: the original search on PubMed using the block searching strategy.