Sleep and Biological Rhythms

Year	# Articles
2021	1

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	s1 worldsleep07

1 (2003)	1	?	?	?	?
3 (2005)	?	1	?	?	?
4 (2006)	?	4	2	?	?
5 (2007)	2	?	?	?	1
7 (2010)	1	1	?	?	?
8 (2010)	1	1	2	?	?
12 (2014)	?	3	?	?	?
13 (2015)	?	1	?	?	?
14 (2016)	?	?	?	1	?
20 (2022)	?	1	?	?	?
21 (2023)	?	1	?	?	?