Here's the original journal article (which is open access): http://www.ehjournal.net/content/pdf/s12940-015-0003-1.pdf http://www.ehjournal.net/content/pdf/s129

Here's the original journal article (which is open access): http://www.ehjournal.net/content/pdf/s12940-015-0003-1.pdf http://www.ehjournal.net/content/pdf/s12940-015-0003-1.pdf