A system, computer-readable storage medium including instructions, and a computer-implemented method for placing players of a multiplayer game in a virtual world are described. A sensor unit 7 is held in a portion of a collar disposed in the axial-direction end portion of the four-row cylindrical roller bearing. The instrumentation includes a bone sculpting tool and a mount for attaching the tool to the second bone. The lysate is in contact with a detector probe that comprises a detectably labeled oligonucleotide that specifically hybridizes with a second target nucleic acid sequence region of ribosomal RNA.