1. Fredrick Bagamba, PhD, corresponding author, Makerere University, College of Agricultural and Environmental Sciences, Kampala, Uganda. Email: fbagamba@caes.mak.ac.ug
2. Ruerd Ruben, PhD, Wageningen University & Research, the Netherlands. Email: ruerd.ruben@wur.nl
3. Arie Kuyvenhoven, PhD, Wageningen University & Research, the Netherlands. Email: arie.kuyvenhoven@wur.nl