1. Research Center for Biomaterials, National Research and Innovation Agency, Bogor, Indonesia
2. Forest Product Laboratory, MUTU International, Depok, Indonesia
3. Department of Forest Product, Faculty of Forestry, Universitas Sumatera Utara, Padang Bulan, Medan, Indonesia
4. JATI-Sumatran Forestry Analysis Study Center, Universitas Sumatera Utara, Medan, Indonesia