Medical gas research

Articles in SafetyLit
Y-Axis = Volume :: X-Axis = Issue
?=unknown status :: X=no issue published :: nn=articles from issue :: A=relevant article(s) IDed to add
S=searched, nothing relevant :: O=issue published but not yet searched :: C=combination issue

		1	2	3	4

4 (2014)	1	?	?	?	?
5 (2015)	2	?	?	?	?
6 (2016)	?	?	?	?	1
7 (2017)	?	?	1	1	?
8 (2018)	?	?	?	?	1
9 (2019)	?	1	?	1	1
10 (2020)	?	2	?	?	?
11 (2021)	?	1	?	?	?
13 (2023)	?	?	1	?	?