A message retrieval subsystem comprises a voice extensible mark-up language browser, a message server, and a message library. The pickup damper is configured to be installed adjacent to a plurality of guide shafts installed on opposite sides of an opening of a base chassis, configured to collide with a pickup and relieve shock via at least three steps in response to an external shock being applied, and configured to prevent the pickup from colliding with the guide shafts to protect the pickup. The one or more cancer markers comprises CXCL13 or CXCR5 or both CXCL13 and CXCR5. Once the restrictions are determined, the framework dynamically constructs the requested implementation. Each codeword subset S1 defines L codewords cj, which are selected from all the codewords ci in the codebook C. The top level portion of the subtree resides within the substrate area containing the top level partition and conveys the clock signal from the entry point to the start point of each synthesized subtree.