Submitted on: 28 November 2009.
Revised on: 26 December 2009.
Accepted on: 22 January 2010.
Lancet Rheumatology
http://reply.papertrans.cn/3/206/20520/20520-32.png
http://reply.papertrans.cn/3/206/20520/20520-33.png
Submitted on: 23 December 2009.
Revised on: 30 December 2009.
Accepted on: 23 January 2010.
Lancet Rheumatology
http://reply.papertrans.cn/3/206/20520/20520-35.png
Submitted on: 29 July 2015.
Revised on: 11 August 2015.
Accepted on: 05 September 2015.
Lancet Rheumatology