1. International Institute of Tropical Agriculture (IITA) PO Box 7878 Kampala Uganda
2. National Coffee Resources Research Institute (NACORRI)/National Agricultural Research Organization (NARO) PO Box 185 Mukono Uganda
3. Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR Eco & Sols, 2 place Viala 34060 Montpellier Cedex 2 France
4. World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri, PO Box 30677 10 00100 Nairobi Kenya