Additional file 1.

Frailty Instruments: Overview of all items. The file contains an overview of all items of the Groningen Frailty Indicator, the Tilburg Frailty Indicator (2nd subscale) and the Sherbrooke Postal Questionnaire.

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Metzelthin et al. BMC Public Health 2010 10:176   doi:10.1186/1471-2458-10-176