HRS Bibliography
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Analysis of panel data with informative missing responses. 2013;3593612:127.
. D
The Disability burden of COPD. COPD. 2012;9(5):513-21. doi:10.3109/15412555.2012.696159.
. http://www.ncbi.nlm.nih.gov/pubmed/22721264?dopt=Abstract