This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).
This article has been retracted at the request of the authors and the Editor-in-Chief.
The authors informed the journal as follows:
In the article, data errors are published that can lead to unreliable results. The authors measured each tumor five times. Unfortunately, when reviewing the article data, the authors found they used a wrong data set. Hence there is a big deviation between the received results and those shown in the article.