Less healthy, but more active: opposing selection biases when recruiting older people to a physical activity study through primary care.
| Autor: | Harris, Tess J.1,2 tharris@sgul.ac.uk, Victor, Christina R3 c.r.victor@reading.ac.uk, Carey, Iain M.1 i.carey@sgul.ac.uk, Adams, Rika2 Rika.Adams@gp-K84020.nhs.uk, Cook, Derek G.1 d.cook@sgul.ac.uk |
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| Zdroj: | BMC Public Health. 2008, Vol. 8 Issue 1, p182-187. 6p. 1 Diagram, 1 Chart. |
| Databáze: | Academic Search Ultimate |
| Externí odkaz: |
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