Upgrading the Helsinki Chronic Pain Index: Version HCPI-E2Hielm-Björkman, A KBerghem, FLarenza, PAuthor informationFaculty of Veterinary Medicine, University of Helsinki, FinlandVeterinary Anaesthesia and Analgesia 41(2):p A34-A35, March 2014.Copyright © 2014 John Wiley & Sons, Ltd