<prompt> For the diagnosis of Deep Vein Thrombosis, 2 tests are done together, namely Impedence Plethy smo graphy and leg scanning after injecting 125I fibri nogen. This process will lead toIncreasing the positive predictive valueIncreasing the negative predictive valueIncreasing the pretest oddsIncreasing the specificity  <response>: In the given question, 2 tests - Impedence Plethysmography and leg scanning after injecting 125I fibrinogen are done together, for the diagnosis of Deep Vein Thrombosis.Therefore these are two tests in done in parallel. 