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. 2017 Mar 22;8:391. doi: 10.3389/fpls.2017.00391

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Copyright © 2017 Maldonado, Barnes, Cornett, Holmfred, Hansen, Persson, Antonelli and Rønsted.

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) or licensor 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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Graph of (A) quinine, (B) quinidine, (C) cinchonine, and (D) cinchonidine concentrations against altitude with markers from the high producing phylogenetic cluster in red. Correlations listed are the Pearson's rank-correlation coefficient.