title: Pain's hidden face.
authors.affiliation: Neuroscience Program of Care, Clinical Center of the National Institutes of Health, Bethesda, MD, USA.
authors.forename: J
authors.initials: J
authors.lastname: Macaluso
mesh_terms: D002908:Chronic Disease; D005149:Facial Expression; D006801:Humans; D010146:Pain / Q000175:diagnosis* / Q000451:nursing / Q000523:psychology*; D010147:Pain Measurement