1. Bio-Met Ltd., 9 Stansfield Close, Headington, Oxford OX3 8TH, UK
2. Forest Research Institute, PO Box 314, Lae, Morobe Province, Papua New Guinea
3. CODEFORSA, 205-4400, Ciudad Quesada, Costa Rica
4. EMBRAPA Amazonia Oriental, PO Box 48, 66095-100, Belem, Para, Brazil
5. Utrecht University, Dept. of Plant Ecology, PO Box 800.48, 3508 TB Utrecht, The Netherlands
6. Oxford Forestry Institute, University of Oxford, South Parks Road, Oxford OX1 3RB, UK