Evaluating the impact of biannual school-based and community-wide treatment on urogenital schistosomiasis in Niger oleh Anna E. Phillips, Zilahatou Tohon, Neerav A. Dhanani, Boubacar Sofo, Issa Gnandou, Boubacar Sidikou, Adamou Garba Noma, Bassirou Madougou, Oumarou Alto, Hannatou Sebangou, Kader M. Halilou, Roumanatou Andia, Amadou Garba, Alan Fenwick, Amina A. Hamidou