http://reply.papertrans.cn/1/40/3913/3913-11.png
http://reply.papertrans.cn/1/40/3913/3913-12.png
Submitted on: 15 February 2019.
Revised on: 14 May 2019.
Accepted on: 23 June 2019.
___________________BMC NURSING---BMC
Submitted on: 08 September 2011.
Revised on: 30 September 2011.
Accepted on: 16 November 2011.
___________________BMC NURSING---BMC
Submitted on: 07 June 2014.
Revised on: 03 October 2014.
Accepted on: 01 November 2014.
___________________BMC NURSING---BMC
http://reply.papertrans.cn/1/40/3913/3913-16.png
Submitted on: 25 June 1998.
Revised on: 22 October 1998.
Accepted on: 16 December 1998.
___________________BMC NURSING---BMC
Submitted on: 10 April 2018.
Revised on: 09 July 2018.
Accepted on: 31 August 2018.
___________________BMC NURSING---BMC
http://reply.papertrans.cn/1/40/3913/3913-19.png
http://reply.papertrans.cn/1/40/3913/3913-20.png