2312-3893
2312-3893
S2312-38932021000200076
10.18004/rvspmi/2312-3893/2021.08.02.76
Venezuela
Ecuador
Ecuador
Ecuador
00
09
2021
00
09
2021
8
2
76
88
[
2020
92
6
6
548-51
]
[
2020
181
2
2
271-80
]
[
2020
24
4
4
2006-11
]
[
2020
92
5
5
491-4
]
[
2020
23
4
4
268-71
]
[
2020
20
4
4
e107-8
]
[
2016
Vol.100
1-20
]
[
2017
46
4
4
815-43
]
[
2012
61
3
3
199-206
]
[
2011
31
17
17
3653-69
]
[
2018
10
11
11
1656
]
[
2019
67
106-18
]
[
2020
12
1
1
236
]
[
2017
39
5
5
930-45
]
[
2018
2018
]
[
2019
33
8
8
9142-53
]
[
2020
12
2
2
575
]
[
2016
8
12
12
806
]
[
2014
5
244
]
[
2012
2012
]
[
2010
43
6
6
692-702
]
[
2011
6
10
10
]
[
2016
47
2
2
520-30
]
[
2017
137
93-101
]
[
2012
8
5
5
1002689
]
[
2019
12
3
3
589-600
]
[
2020
53
6
6
]
[
2011
241
1
1
260-8
]
[
2020
5
1
1
]
[
2016
9
1
1
54-7
]
[
2015
7
9
9
8127-51
]
[
2016
68
2
2
84-91
]
[
2020
17
2
]
[
2013
42
2
2
319-32
]
[
2019
20
3
3
273-82
]
[
2019
2019
]
[
2020
74
6
6
856-9
]
[
2020
1-7
]
[
2020
30
5
5
2119
]
[
2020
22
133-4
]
[
2016
13
7
7
404-17
]
[
2018
24
9
9
69S-75S
]
[
2019
9
11
11
649
]
[
2018
19
8
8
2419
]
[
2017
173
5-12
]
[
2013
8
6
6
65835
]
[
2017
356
6583
]
[
2019
380
1
1
33-44
]
[
2015
70
7
7
617-24
]
[
2012
64
3
3
166-71
]
[
2018
57
6
6
2001-36
]
[
2019
11
1
1
128
]
[
2020
203
105751
]
[
2020
204
105771
]