. 2015 Dec 10;12(12):15769–15781. doi: 10.3390/ijerph121215018

Table 2.

Type of environmental hazard assessed in studies.

Author #	Type of Environmental Hazard Assessed
Author #	Tobacco	Pesticides	Lead	Mold	Other Metal(s)	Other Hazard(s)
1		√			√	√
2		√ ^a
3	√		√			√
4	√ ^a
5						√
6						√
7	√		√	√		√
8	√ ^a
9	√ ^a
10					√ ^a
11						√ ^a
12						√ ^a
13	√	√	√		√	√
14	√ ^a
15	√ ^a
16		√ ^a
17	√	√		√	√	√
18					√	√
19		√ ^a
20	√				√	√
21		√	√	√
22	√	√	√	√	√	√
23	√ ^a
24	√ ^a
25	√ ^a
26	√		√	√	√	√
27	√ ^a
28					√ ^a
29	√		√			√
30	√ ^a
31	√ ^a
32	√ ^a
33						√ ^a
34	√ ^a
35	√ ^a
36	√	√	√	√	√	√
37	√	√		√		√
38	√ ^a
39	√ ^a
40	√			√		√
41	√ ^a
42	√	√	√	√	√	√
43	√	√	√	√	√	√
Total # of Studies # of studies on single hazard	30 17	12 3	10 0	10 0	12 2	20 3

Note: ^a Study assessed only a single exposure.