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(a) Experimental AFM indentation curves of two representative lymphocytes, one from control sample and one from CLL sample. The elastic moduli of lymphocytes were quantitatively determined by fitting force-indentation curves to standard Hertz model for a pyramidal tip. (b) Elastic modulus values of the control sample (n = 10) and the CLL sample (n = 14). *p was calculated using Mann-Whitney nonparametric analysis.
