|
Morrell et al. 2006 (United Kingdom)
|
Gowani et al. 2014 [21] (Pakistan)
|
Tozan, 2010 [14] (Tanzania)
|
|
Pugh et al. 2002 [29] (USA)
|
Barzgar et al. 1997 [20] (Pakistan)
|
Gonzalez, 2000 [13] (Tanzania)
|
|
Frick et al. 2012 [28] (USA)
|
Hafeez et al. 2011 [22] (Pakistan)
|
Conteh et al. 2010 [15] (Ghana)
|
|
Margellos-Anast, 2012 [30] (USA)
|
Borghi, 2005 [23] (Nepal)
|
Nonvignon et al. 2013 (Ghana)
|
| |
Puett et al. 2013 [24] (Bangladesh)
|
Desmond et al. 2008 [17] (South Africa)
|
| |
San Sebastian et al. 2001 [25] (Ecuador)
|
Pagnoni et al. 1997 [18] (Burkina Faso)
|
| |
Aracena et al. 2009 [26] (Chile)
|
Chola, 2011 [19] (Uganda)
|
| |
Melville et al. 1995 (Jamaica) [27]
| |
