http://www.foodandnutritionresearch.net/lib/pkp/js/classes/Helper.js
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http://www.tellusa.net/lib/pkp/js/classes/Helper.js
http://ssjournals.com/lib/pkp/js/classes/Helper.js
http://cjc-online.ca/lib/pkp/js/classes/Helper.js
http://www.journalofextracellularvesicles.net/lib/pkp/js/classes/Helper.js