Submitted on: 16 September 2013.
Revised on: 26 September 2013.
Accepted on: 21 October 2013.
SWISS MEDICAL WEEKLY---SMW SUPPORTING ASSOCIATION
http://reply.papertrans.cn/3/291/29090/29090-32.png
http://reply.papertrans.cn/3/291/29090/29090-33.png
http://reply.papertrans.cn/3/291/29090/29090-34.png
http://reply.papertrans.cn/3/291/29090/29090-35.png
http://reply.papertrans.cn/3/291/29090/29090-36.png