1. Dendro Sciences Group, Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland.
2. Department of Ecology, W. Szafer Institute of Botany, Polish Academy of Sciences, ul. Lubicz 46, 31-512 Kraków, Poland.
3. Laboratory of Tree-Ring Research, University of Arizona, 1215 E. Lowell St., Tucson, AZ 85721, USA.
4. Stefan cel Mare University of Suceava, Strada Universitătii 13, Suceava 720229, Romania.
5. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
6. Laurentian Forestry Centre, Canadian Forest Service, Natural Resources Canada, Quebec, QC G1V4C7, Canada.
7. Centre d’étude de la forêt, Université du Québec à Montréal, C.P. 8888, succ. Centre-ville, Montréal, QC H3C 3P8, Canada.