An object of the present invention is to provide a cytotoxic assay using a new established fish cell line. The systems are operable to determine the state of one or more storage units and manage deduplication requests in part based state information. The system then performs a relationship function identified by the relationship selection selected by the user. When the message clients request a synchronization, the tokens they received are returned to the message server for comparison with the tokens the message server sent to the message clients. One of the surfaces of the absorbent layer is mutually joined with the material layer in contact therewith, within a region immediately surrounding the bend indication, on both sides thereof.