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http://reply.papertrans.cn/4/302/30136/30136-32.png
Submitted on: 03 April 2003.
Revised on: 23 April 2003.
Accepted on: 28 April 2003.
Ultrasound International Open
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Submitted on: 02 April 1999.
Revised on: 27 April 1999.
Accepted on: 13 May 1999.
Ultrasound International Open---GEORG THIEME VERLAG KG