http://reply.papertrans.cn/3/206/20512/20512-11.png
Submitted on: 15 February 2000.
Revised on: 24 March 2000.
Accepted on: 29 March 2000.
NULL
Submitted on: 09 February 2014.
Revised on: 11 March 2014.
Accepted on: 22 March 2014.
Lancet Regional Health-Americas
Submitted on: 22 October 2017.
Revised on: 12 November 2017.
Accepted on: 21 November 2017.
Lancet Regional Health-Americas
http://reply.papertrans.cn/3/206/20512/20512-15.png
Submitted on: 07 December 2011.
Revised on: 19 January 2012.
Accepted on: 25 January 2012.
Lancet Regional Health-Americas
http://reply.papertrans.cn/3/206/20512/20512-17.png
http://reply.papertrans.cn/3/206/20512/20512-18.png
Submitted on: 10 October 2013.
Revised on: 16 November 2013.
Accepted on: 03 December 2013.
Lancet Regional Health-Americas
http://reply.papertrans.cn/3/206/20512/20512-20.png