1. Faculty of Sciences and Arts, Department of Environment and Agroforestry, Catholic University of Ávila, 05005 Ávila, Spain
2. Silvanet Research Group, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
3. Faculty of Agriculture, Department of Landscape Architecture, Aydın Adnan Menderes University, Aydın 09100, Turkey
4. Faculty of Pharmacy, Department of Pharmacology, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, 28040 Madrid, Spain
5. Faculty of Applied Sciences, WSB University, 41-300 Dąbrowa Górnicza, Poland
6. CITUR–Madeira–Centre for Tourism Research, Development and Innovation, 9000-082 Funchal-Madeira, Portugal
7. College of Business and Economics, University of Johannesburg, Auckland Park P.O. Box 524, South Africa