The present invention provides a photoelectric conversion element comprising: an electron transport layer which has an excellent electron transport property and a sufficient reaction interface, and having excellent conversion efficiency. The method mechanically polishes a surface of a structure including the base and the laminate close to a magnetic recording medium, wherein the surface of the structure includes an end face of the laminate including an end face of the magneto-resistive device and a surface of the base. Preferably, the string and the securing elements are color coded to assist the child in manipulating the string in a series of steps to form a bow in the string. The first management unit is configured to manage first management information relating to the first data group. A removable light source head may be included on the forensic light to provide for head swapping to give the user access to different wavelengths of light. The method includes generating an electrotherapy signal that stimulates a vagal response of an autonomic nervous system of the patient when the patient is tested.