It has been brought to our attention by a reader of Sensors that substantial portions of this article [] have been copied from an earlier publication [] without credit. After confirming this case with the authors, we have determined that indeed this manuscript clearly violates our policy on originality of all material submitted for publication and the generally accepted ethics of scientific publication. Consequently, the Editorial Team and Publisher have determined that it should be retracted. We apologize for any inconvenience this may cause.
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