An object of the invention is to receive a weak signal with high sensitivity and reduce distortion and signal suppression when a strong interference signal exists. The laser assembly has an upper pair of lasers located in known, spaced relationship above a lower pair of lasers ; detector assemblies are also provided including substantially parabolic reflective surfaces with detectors disposed substantially at the focal point of the surfaces. In another embodiment, an axial force generating mechanism can include a torsion spring, a traction ring adapted to receive the torsion spring, and a roller cage retainer configured to cooperate with the traction ring to house the torsion spring. A symlink file located on the read only medium points to and triggers the activation of the symlink file on RAM. The invention also relates to a treatment for enhancing clot lysis comprising administering an antibody directed toward 2-antiplasmin crosslinked to fibrin which does not inhibit plasma 2AP together with a thrombolytic agent.