A measuring part 67 measures the potential of a collecting electrode 66 having collected positive and negative ions respectively generated by ion generating parts 61 of ion generators 6a and 6b and ion generating parts 62 of ion generators 6c and 6d. The illuminating device includes a sealed box-shaped housing wherein the circuits, batteries and LEDs. The door assembly includes an outer, exposed surface and an inner surface that are spaced to define an inner door zone including a vertical drop zone that terminates in a delivery area. The present invention further relates to diagnostic methods for detecting carcinomas, including human breast carcinomas. The insulating interlayer may have a nitrided surface portion and the phase-changeable material layer may be at least partially on the nitrided surface portion of the insulating interlayer. Inconsistent answers are identified and the information obtained is reported to the underwriter who can determine whether or not the insurance premium of the insured should be adjusted.