When and how to use instrumental variables in palliative care research.
Center for Research on Health Care Across Site and Systems of Care, John J. Peters VA Medical Center, Bronx, New York 10468, USA. joan.penrod@mssm.edu
Joan D
JD
Penrod
Nathan E
NE
Goldstein
Partha
P
Deb
D015986:Confounding Factors, Epidemiologic; D003627:Data Interpretation, Statistical; D006801:Humans; D019370:Observation; D010166:Palliative Care; D012107:Research Design; D015983:Selection Bias