title: The known knowns and known unknowns of chronic pain.
authors.affiliation: Toronto Western Hospital, University Health Network, University of Toronto, 399 Bathurst Street, Toronto, ON, M5T 2S8, Canada. Philip.peng@uhn.ca.
authors.forename: Philip
authors.initials: P
authors.lastname: Peng
mesh_terms: D059350:Chronic Pain; D006801:Humans