1. Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, Vancouver, V6T 1Z4, Canada
2. Pharmacognosy Department, Faculty of Pharmacy, Alexandria University, 21521, Egypt
3. Department of Genetics and Physiology of Forest Trees, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, 165 21 Praha 6, Czech Republic
4. Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, Oklahoma 74078