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WBC, lymphocytes, and neutrophils from baseline (preoperative), day 2, day 4, and day 6 until coronavirus disease 2019 diagnosis. Values are presented with box plots (upper and lower borders of the box represent the upper and lower quartiles; the middle horizontal line represents the median; the upper and lower whiskers represent the maximum and minimum values of non-outliers; extra dots represent outliers) (see Table 4). WBC, White blood cell.
