Effect of well drilling on Buruli ulcer incidence in Benin: a case-control, quantitative survey oleh Horace Degnonvi, MS, Sebastien Fleuret, PhD, Clement Coudereau, PhD, Ronald Gnimavo, MD, Sigrid Giffon, MS, Edouard Yeramian, PhD, Roch Christian Johnson, PhD, Estelle Marion, PhD