Sally Theobald1
, Miriam Taegtmeyer2
, Stephen Bertel Squire2
, Jo Crichton3
, Bertha Nhlema Simwaka4
, Rachael Thomson2
, Ireen Makwiza5
, Rachel Tolhurst1
, Tim Martineau1
and Imelda Bates6 
1
International Health Research Group, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
2
Clinical Research Group, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
3
African Population and Health Research Center, PO Box 10787 -00100 GPO, Nairobi, Kenya
4
PATH, 3039 Makishi Road Fairview Area, Lusaka, Zambia
5
Research for Equity and Community Health (REACH Trust), PO Box 1597, Lilongwe, Malawi
6
Disease Control Strategy Group, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK