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Hamid Reza Safaei, Ayoob Rostamzadeh, Omid Rahmani, Mohsen Mohammadi, Omar Ghaderi, Hamid Yahaghi, Koroosh Ahmadi. "Retraction Note to: Prognostic investigations of B7-H1 and B7-H4 expression levels as independent predictor markers of renal cell carcinoma." Tumor Biology 37.12 (2016) 16423-16423