Adding telephone follow-up can improve representativeness of surveys of seriously ill people

Affiliations

• ¹ RAND Corporation, Santa Monica, California, USA.
• ² RAND Corporation, Arlington, Virginia, USA.
• ³ RAND Corporation, Boston, Massachusetts, USA.
• ⁴ Yale School of Public Health, Yale University, New Haven, Connecticut, USA.
• ⁵ Oregon Health and Science University, Portland, Oregon, USA.