2312-3893
2312-3893
S2312-38932019000200084
10.18004/rvspmi/2312-3893/2019.06.02.84-089
Ecuador
Ecuador
00
09
2019
00
09
2019
6
2
84
89
[
2015
15
2
2
514
]
[
2014
15
143-6
]
[
2018
48
97-100
]
[
1989
46
8
8
862-7
]
[
2015
54
15
15
1881-4
]
[
2015
115
7
7
465
]
[
2017
9
3
3
299-303
]
[
2016
21
1
1
56-9
]
[
1984
41
3
3
341-2
]
[
2015
114
1
1
698-706
]
[
2014
58
6
6
286-7
]
[
2002
59
3
3
448-52
]
[
2017
57
10
10
591-4
]
[
2018
33
2
2
67-72
]
[
2018
33
4
4
175-87
]
[
2014
35
12
12
1851-5
]
[
2008
21
4
4
497-503
]
[
2002
200
1-2
1-2
57-62
]
[
2015
7
29
29
2859-70
]
[
2017
7
456
]