12 months research in South Africa (2007, 2008)
23 months research in Benin (2000 – 2002, 2004, 2005)
2 months research in Ethiopia (1995)
12 months research in South Africa (2007, 2008)
23 months research in Benin (2000 – 2002, 2004, 2005)
2 months research in Ethiopia (1995)