The present invention can be used for mobile communication and is able to provide an antenna which can assure excellent radiation characteristic, decreasing the degree of coupling between two antenna elements without using any changeover switch. Two or more audio signals are received. In a specific embodiment of the invention, CNTF may be used to support the growth of spinal cord neurons, thereby providing a method of treating spinal cord damage caused by trauma infarction, infection, nutritional deficiency or toxic agents.