0104-4036
0104-4036
S0104-40362019000300456
10.1590/s0104-40362019002702196
South Africa
00
07
2019
00
07
2019
27
104
456
475
[
2008
15
1
1
5-28
]
[
1969
]
[
1981
]
[
2006
55
3
3
303
]
[
2018
]
[
2010
]
[
2014
]
[
1978
7
379-403
]
[
2004
53
1
1
87-112
]
[
2000
41-57
]
[
1978
]
[
1968
]
[
1999
]
[
2018
14
1
1
73-80
]
[
2006
42
1
1
1-10
]
[
1963
]
[
1996
a
1-22
]
[
1993
41-68
]
[
1996
b
468-78
]
[
2002
7
2
2
134-48
]
[
2009
]
[
2016
1
1
1
33-9
]
[
2003
7
3
3
189-96
]
[
2014
8
]
[
1966
3
5
5
551-8
]
[
1980
159-87
]
[
2000
1
2
2
1-10
]
[
2001
]
[
1999
19
4
4
449-61
]
[
1998
]
[
1994
2
]
[
2015
]
[
1981
4
4
4
452-65
]
[
1976
]
[
2004
34
3
3
257-78
]
[
1989
17
2
2
187-226
]
[
2001
57
3
3
493-510
]
[
1998
4
3
3
237-47
]
[
2003
34-41
]
[
2003
132-4
]
[
2000
23
4
4
334-40
]
[
2017
23
4
4
336-49
]
[
2002
]
[
2000
63
3
3
224-37
]
[
2008
]
[
2010
]
[
2018
26
100
100
595-618
]
[
2010
1
4
4
347-65
]
[
1961
301-5
]
[
2018
27
3
3
170-5
]
[
2008
182-202
]
[
2010
44
3
3
261-80
]