http://reply.papertrans.cn/2/104/10352/10352-21.png
Submitted on: 03 July 2010.
Revised on: 20 October 2010.
Accepted on: 30 October 2010.
___________________Gaceta Sanitaria---ELSEVIER
Submitted on: 18 December 2009.
Revised on: 03 March 2010.
Accepted on: 19 April 2010.
___________________Gaceta Sanitaria---ELSEVIER
http://reply.papertrans.cn/2/104/10352/10352-24.png
http://reply.papertrans.cn/2/104/10352/10352-25.png
Submitted on: 15 June 2017.
Revised on: 13 September 2017.
Accepted on: 01 November 2017.
___________________Gaceta Sanitaria---ELSEVIER
http://reply.papertrans.cn/2/104/10352/10352-27.png
http://reply.papertrans.cn/2/104/10352/10352-28.png
http://reply.papertrans.cn/2/104/10352/10352-29.png
Submitted on: 12 January 2022.
Revised on: 09 April 2022.
Accepted on: 29 May 2022.
___________________Gaceta Sanitaria---ELSEVIER