1. Graduate School of Agriculture; Kyoto University; Oiwake-cho Kitashirakawa Sakyo-ku Kyoto Japan
2. Institute for Global Environmental Strategies; Kamiyamaguchi 2108-11 Hayama-cho Kanagawa Japan
3. Botanical Research Center; Sarawak Forestry Corporation; Km 20, Jalan Puncak Borneo Semenggoh Kuching Sarawak 93250 Malaysia
4. Japan Forest Technology Association; 7 Rokuban-cho Chiyoda-ku Tokyo Japan
5. Forest Research Centre; Sabah Forestry Department; 90715 Sandakan Sabah Malaysia