Tekola-Ayele, Fasil
Adeyemo, Adebowale
Chen, Guanjie
Hailu, Elena
Aseffa, Abraham http://orcid.org/0000-0002-8028-1150
Davey, Gail http://orcid.org/0000-0003-2796-7468
Newport, Melanie J
Rotimi, Charles N http://orcid.org/0000-0001-5759-053X
Article History
Received: 21 January 2014
Revised: 17 September 2014
Accepted: 26 September 2014
First Online: 5 November 2014
Competing interests
: The authors declare no conflict of interest.