Dr Johnny Roughan, University of Newcastle, United Kingdom:
How far are we in the quantification of animal pain?
https://www.ncl.ac.uk/ion/staff/profile/johnnyroughan.html#background
Prof. Cassandra B. Tucker, Tucker LAB, UC Davis, USA:
Pain and management procedures in cattle
http://tuckerlab.ucdavis.edu/cassandra-tucker.html#
Dr Jennifer Mather, University of Lethbridge, Canada:
Evolutionary aspects of pain and suffering
http://directory.uleth.ca/users/mather
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