Correction: Cross-sectional validation of the PROMIS-Preference scoring system

• Janel Hanmer,
• Barry Dewitt,
• Lan Yu,
• Joel Tsevat,
• Mark Roberts,
• Dennis Revicki,
• Paul A. Pilkonis,
• Rachel Hess,
• Ron D. Hays,
• Baruch Fischhoff,
• David Feeny,
• David Condon,
• David Cella