1. INIA-Forest Research Centre. Ctra A Coruña km 7.5, Madrid, Spain
2. iuFOR-Sustainable Forest Management Research Institute, University of Valladolid & INIA, Ctra A Coruña km 7.5, Madrid, Spain
3. Department of Natural Systems and Resources, School of Forest Engineering and Natural Environment, Universidad Politécnica de Madrid, Sede Montes, C/ Jose Antonio Novais, 10 Madrid, Spain
4. Chair for Forest Growth and Yield Science, Center of Life and Food Sciences Weihenstephan, Technical University of Munich, Hans-Carl-von-Carlowitz-Platz 2, Freising, Germany
5. Department of Natural Resources and the Environment, University of New Hampshire, 114 James Hall, Durham, NH, USA