Methods for diagnosing pathology of the liver in subject suspected of having such pathology by measuring the glycosylation of anti-gal IgG in various biological fluids of the subject. The polymer light emitting material exhibits high light emission efficiency above 5%, which is the limit of external quantum efficiency of fluorescence and can be designed so as to have a large area and hence are suitable for mass production of organic light emitting devices. A retracting force of the measuring force 32 is produced by the tilt \u03b8, and thus, is obtained as mgsig \u03b8 which is much small as compared with a self weight \u201cm\u201d. The method may additionally include causing the touch sensor controller to control the rate of sampling such that the touch sensor operates at the desired rate of sampling.