Awindaogo, F
Smith, V C
Litt, J S
Article History
Received: 8 July 2015
Revised: 4 November 2015
Accepted: 5 November 2015
First Online: 17 December 2015
Competing interests
: The analyses presented in this manuscript are the original work of the authors. The paper is unpublished and is not currently under review by any other publication. The authors declare no conflict of interest.