“…Another 20 papers were removed in the full-text level screening. Out of these, 15 did not present a VM consolidation approach [1,9,19,[26][27][28][29]32,45,47,52,54,58,60,63], 2 presented a centralized VM consolidation approach [15,23], 2 were published in several papers [20,37], and 1 had a duplicate record [49]. Finally, from the remaining 21 papers, 2 papers were removed in the quality assessment stage because their aggregate scores were below the cutoff point [7,34].…”