We wish to make readers aware that text in [1] has been taken from other publications by the same author. In particular, much of Section 1, the first part of Section 2 and the first sentence of Section 3 are copied verbatim from [2]. Table 1 and the second part of Section 2 are taken from [3]. The main novel contribution of [1] lies in Section 3. We regret that these issues were not picked up before publication and wish to apologize to readers of Cancers.
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