1. a Global Infectious Disease Research Program, Department of Public Health , College of Public Health, University of South Florida , 3720 Spectrum Blvd, Suite 304, Tampa , FL , 33612 , USA
2. b Onchocerciasis Control Programme (OCP) , B. P. 1473 Avenue Norte, Zombre, Sector 8, Ouagadougou, Burkina Faso , West Africa
3. c Department of Chemistry , University of Pittsburg , 3260 Forbes Avenue, First Floor, USA
4. d Department of Biology , Wake Forest University , 226 Winston Hall, Box 7325 Reynolda Station, Winston-Salem , NC , 27109 , USA
5. e School of Economic and Policy Sciences, The University of Texas at Dallas , 800 West Campbell Road, Richardson , TX , 75080-3021 , USA