The authors regret that under the “Acknowledgements” section the NIH grants details are unfortunately incorrect. The correct acknowledgement is written below. This study was made possible by Grants R21-AT02381-02 (GM), R01-CA130932-02 (JF), and F32-AT004876-02 (TL) from the National Institutes of Health. The contents are solely the responsibility of the authors and do not necessarily represent the official views of the NCCAM or NIH. We would like to gratefully acknowledge Mr. Juan-Carlos Brenes, University of Costa Rica for his assistance in the plant collections and technical help, as well as Dr. Harry Besselink, BioDetection Systems B.V., Amsterdam, The Netherlands for his assistance with the ER CALUX® assay. The authors would like to apologise for any inconvenience caused.