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. 2018 Aug 3;9:1758. doi: 10.3389/fmicb.2018.01758

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Copyright © 2018 Agostinelli, Cleary, Martín, Albrectsen and Witzell.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Even aged 15-year-old pedunculate oak trees planted in 2003 in Alnarp. In the picture the three vitality classes: high vitality (A), medium vitality (B), and low vitality (C). Photo Marta Agostinelli.