1. Department of Forest Product, Faculty of Forestry, Universitas Sumatera Utara, Medan, Indonesia
2. Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Cibinong, Indonesia
3. School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung, Indonesia
4. Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta, Indonesia