Propensity score methods and unobserved covariate imbalance: comments on "squeezing the balloon".

M.S. Ali, R.H.H. Groenwold, O.H. Klungel

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

Original languageEnglish
Pages (from-to)1074-1082
Number of pages9
JournalHealth Services Research
Volume49
Issue number3
Publication statusPublished - 2014

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