At present, no direct evidence of evidence-based medicine has been showed that advantages and disadvantages of two kinds of operation approach.

目前没有直接的循证医学证据表明两种手术入路方式的优劣。

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Health officials believe people are contracting the virus through direct contact with infected fowl and say there has been no evidence so far that the virus is spreading easily between people.

NPR: China Kills Market Birds As Flu Found In Pigeons