Submitted on: 30 June 2000.
Revised on: 22 July 2000.
Accepted on: 01 August 2000.
___________________International Health---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/129/12888/12888-12.png
Submitted on: 07 January 2011.
Revised on: 26 April 2011.
Accepted on: 20 May 2011.
___________________International Health---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/129/12888/12888-14.png
Submitted on: 30 November 2004.
Revised on: 08 February 2005.
Accepted on: 19 March 2005.
___________________International Health---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/129/12888/12888-16.png
http://reply.papertrans.cn/2/129/12888/12888-17.png
Submitted on: 01 July 2002.
Revised on: 20 September 2002.
Accepted on: 06 November 2002.
___________________International Health---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/129/12888/12888-19.png
Submitted on: 08 June 2014.
Revised on: 19 July 2014.
Accepted on: 01 September 2014.
___________________International Health---OXFORD UNIV PRESS