Submitted on: 20 December 2010.
Revised on: 23 February 2011.
Accepted on: 08 April 2011.
___________________Geriatrics---MDPI
http://reply.papertrans.cn/2/108/10710/10710-12.png
Submitted on: 06 December 2002.
Revised on: 28 March 2003.
Accepted on: 12 May 2003.
___________________Geriatrics---MDPI
http://reply.papertrans.cn/2/108/10710/10710-14.png
Submitted on: 03 November 2019.
Revised on: 27 January 2020.
Accepted on: 10 March 2020.
___________________Geriatrics---MDPI
Submitted on: 14 February 2008.
Revised on: 10 May 2008.
Accepted on: 23 May 2008.
___________________Geriatrics---MDPI
Submitted on: 17 August 2006.
Revised on: 29 October 2006.
Accepted on: 25 November 2006.
___________________Geriatrics---MDPI
http://reply.papertrans.cn/2/108/10710/10710-18.png
http://reply.papertrans.cn/2/108/10710/10710-19.png
Submitted on: 02 July 2021.
Revised on: 19 August 2021.
Accepted on: 15 September 2021.
___________________Geriatrics---MDPI