Submitted on: 28 February 2015.
Revised on: 12 April 2015.
Accepted on: 29 April 2015.
Lancet Global Health
http://reply.papertrans.cn/3/205/20494/20494-32.png
Submitted on: 06 December 2014.
Revised on: 01 January 2015.
Accepted on: 25 January 2015.
Lancet Global Health
http://reply.papertrans.cn/3/205/20494/20494-34.png
http://reply.papertrans.cn/3/205/20494/20494-35.png
http://reply.papertrans.cn/3/205/20494/20494-36.png