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Improving Retention of Very Old Participants in Longitudinal Research: Experiences from the Newcastle 85+ Study
- Karen Davies,
- Andrew Kingston,
- Louise Robinson,
- Joan Hughes,
- Judith M. Hunt,
- Sally A. H. Barker,
- June Edwards,
- Joanna Collerton,
- Carol Jagger,
- Thomas B. L. Kirkwood
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- Published: October 10, 2014
- https://doi.org/10.1371/journal.pone.0108370