A method for treating a subject is provided, including receiving a sensor signal responsive to the subject eating, analyzing the sensor signal, and driving a current into tissue of the subject responsive to analyzing the signal. The operation method of shutter glasses based 3D display device according to the present invention alleviates after image caused by crosstalk between left and right eyes without shortening the duty time of each block of BLU. The invention further provides kits comprising one or more pieces of collagen biofabric, for example laminated collagen biofabric, for the repair of a tympanic membrane. The jaw elements have interposed between them a spring element that serves to bias the jaw elements in the closed position. More particularly, the present invention relates to the present invention relates to a method and system which can more simplify procedures of payment when a user makes a payment with a plurality of payment means or when the user cancels a payment partially, changes a payment means, or changes goods.