Submitted on: 10 July 2014.
Revised on: 22 August 2014.
Accepted on: 16 September 2014.
NULL
Submitted on: 16 December 2020.
Revised on: 12 January 2021.
Accepted on: 25 January 2021.
Lancet Regional Health-Americas
Submitted on: 19 October 2001.
Revised on: 21 November 2001.
Accepted on: 27 November 2001.
NULL
Submitted on: 25 December 2019.
Revised on: 04 January 2020.
Accepted on: 29 January 2020.
NULL
http://reply.papertrans.cn/3/206/20512/20512-35.png
Submitted on: 06 May 2001.
Revised on: 26 May 2001.
Accepted on: 21 June 2001.
NULL