Submitted on: 13 March 1999.
Revised on: 12 May 1999.
Accepted on: 30 May 1999.
___________________BMC Endocrine Disorders---BMC
Submitted on: 31 July 2005.
Revised on: 03 September 2005.
Accepted on: 13 October 2005.
___________________BMC Endocrine Disorders---BMC
Submitted on: 16 March 1998.
Revised on: 10 June 1998.
Accepted on: 31 July 1998.
___________________BMC Endocrine Disorders---BMC
http://reply.papertrans.cn/1/39/3878/3878-34.png
http://reply.papertrans.cn/1/39/3878/3878-35.png
Submitted on: 23 October 2014.
Revised on: 02 December 2014.
Accepted on: 17 December 2014.
___________________BMC Endocrine Disorders---BMC