#	Searches
1	Pneumothorax/
2	(pneumothora* or "pneumo thora*").tw,kw.
3	PTX.tw,kw.
4	1 or 2 or 3
5	Radiography/
6	radiography, thoracic/
7	radiograph*.tw,kw.
8	roentgen*.tw,kw.
9	radiogram*.tw,kw.
10	radiology.tw,kw.
11	chest film*.tw,kw.
12	CXR.tw,kw.
13	x‐ray*.tw,kw.
14	x ray*.tw,kw.
15	xray.tw,kw.
16	5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15
17	Ultrasonography/ or focused assessment with sonography for trauma/
18	(Ultrasound* or "ultra sound*").tw,kw.
19	sonogra*.tw,kw.
20	(ultrasonogra* or "ultra sonogra*").tw,kw.
21	CUS.tw,kw.
22	ultrasonic.tw,kw.
23	echotomograph*.tw,kw.
24	echograph*.tw,kw.
25	17 or 18 or 19 or 20 or 21 or 22 or 23 or 24
26	4 and 16 and 25