- Dr Jacobijn Gussekloo, Section of Gerontology and Geriatrics, Department of General Internal Medicine, Leiden University Medical Centre, PO box 9600, 2300 RC Leiden, the Netherlands. Telephone 0031 71 5266640; fax 0031 71 5248159; email
- Received February 5, 1999
- Revised May 5, 1999
- Accepted May 13, 1999
- First published October 1, 1999.
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