A cable holding structure including a plurality of ribs 51 stand on an inner surface of a housing 3, and holing cables 41, 43, wherein the ribs 51 are arranged on a closed figure formed on the inner surface of the housing 3 at predetermined gaps between the neighboring ribs 51. The heater assembly may be configured to uniformly heat a large area processing element, such as a processing element that spans a plurality of substrates. This may be accomplished by providing a power storage device for use in the event of a power loss. The cover also comprises a cover plate having a switch handle aperture for receiving the handle cover. A specimen review system is also described, including a specimen stage configured to receive specimens for viewing, a source of illumination providing illumination to the specimen stage, a review scope configured to review specimens positioned on the specimen stage, the review scope comprising a parcentric objective configured to resolve a field of view of the specimen stage. 6 to 3% by weight; further, the synergistic composition of lignan is used in combination with pharmaceutically acceptable carriers for inhibiting growth of various human cancer cell lines selected from breast, cervix, neuroblastoma, colon, liver, lung, mouth, ovary and prostate tissues.