A fuel cell includes a stacked body of a membrane electrode assembly and of separators. There is also provided a refractive index adjuster, such as, e. Rather than imposing a dimension beyond which the heart cannot expand, the harness provides no hard limit over the range of diastolic expansion of the ventricle. The arm extends through the cam and the outside spindle. The document may also be accessed by a database server to determine which portions of query results should be encrypted prior to sending the query results to the requesting entity over the network.