Figure 3From: Macrorheology of cystic fibrosis, chronic obstructive pulmonary disease & normal sputum Box and whisker plot comparing rheology of mucoid sputum from normal, COPD and CF subjects for storage modulus. (No significant differences were observed between normal and CF sputum for storage modulus G' at 9 Hz. Normal n = 7, CF n = 4, COPD n = 8. * by Mann-Whitney U Test).Back to article page