sentences:  In the 1980s, he took part in various WHO technical working groups on anaemia, maternal mortality and VVF.In the 1990s, he influenced the formation of the National Foundation of VVF - a local NGO - becoming its president in 1997-1998.Its activities placed the surgical treatment of VVF in Nigeria's national agenda The WHO and other powerful international organisations and many NGOs have since taken over the concept and extended it to other African and some Asian countries.