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Submitted on: 28 December 2019.
Revised on: 14 March 2020.
Accepted on: 29 April 2020.
___________________BMC Geriatrics---BMC
Submitted on: 12 April 2018.
Revised on: 24 July 2018.
Accepted on: 09 September 2018.
___________________BMC Geriatrics---BMC
Submitted on: 29 March 2002.
Revised on: 12 July 2002.
Accepted on: 26 August 2002.
___________________BMC Geriatrics---BMC
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Submitted on: 09 September 2013.
Revised on: 05 October 2013.
Accepted on: 27 October 2013.
___________________BMC Geriatrics---BMC
Submitted on: 06 April 2022.
Revised on: 08 May 2022.
Accepted on: 03 July 2022.
___________________BMC Geriatrics---BMC
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