http://reply.papertrans.cn/3/205/20493/20493-31.png
Submitted on: 23 May 2008.
Revised on: 08 June 2008.
Accepted on: 21 June 2008.
Lancet Global Health---ELSEVIER SCI LTD
Submitted on: 18 January 2005.
Revised on: 27 February 2005.
Accepted on: 20 March 2005.
Lancet Global Health
http://reply.papertrans.cn/3/205/20493/20493-34.png
http://reply.papertrans.cn/3/205/20493/20493-35.png
Submitted on: 02 November 2014.
Revised on: 24 November 2014.
Accepted on: 19 December 2014.
Lancet Global Health