P. Nortey | Department of Applied Epidemiology and Disease Control, School of Public Health, University of Ghana, Legon| panortey@gmail.com 
B. Gyan | Noguchi Memorial Institute of Medical Research, Immunology Department, University of Ghana, Legon | bgyan@noguchi.ug.edu.gh
L. H. Ofosu-Appiah | National Public Health and Reference Laboratory, Accra, Ghana | kobyofosuappiah@yahoo.co.uk
P. Dsane-Aidoo | Ghana Field Epidemiology and Laboratory Training Program | dsaneaidoo@gmail.com
J. A. Frimpong | Ghana Field Epidemiology and Laboratory Training Program | asamoah.frimpong@gmail.com 
D. K. Ameme | Ghana Field Epidemiology and Laboratory Training Program | amemedonne@yahoo.com 
 S. O. Sackey | Ghana Field Epidemiology and Laboratory Training Program | sackey492003@yahoo.co.uk
E. Kenu | Ghana Field Epidemiology and Laboratory Training Program| ernest_kenu@yahoo.com