title: Pain measurement: present concerns and future directions.
authors: Karen
authors: K
authors: Feldt
mesh_terms: D005544:Forecasting; D006801:Humans; D010146:Pain / Q000145:classification* / Q000175:diagnosis*; D010147:Pain Measurement / Q000379:methods* / Q000639:trends*; D011594:Psychometrics / Q000379:methods* / Q000639:trends*; D012720:Severity of Illness Index