Funding for this research was provided by:
California Department of Food and Agriculture (01-0712)
U.S. Department of Agriculture (2005-34442-15841)
Text and Data Mining valid from 2018-05-04
Received: 8 August 2017
Accepted: 26 April 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.