Article Takedown/Update Request

This is an update request for the document Efficiency of Repeated Phytoextraction of Cadmium and Zinc from an Agricultural Soil Contaminated with Sewage Sludge by Kai Luo, Tingting Ma, Hongyan Liu, Longhua Wu, Jing Ren, Fengjiao Nai, Rui Li, Like Chen, Yongming Luo and Peter Christie

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