If you believe that you have evidence and can prove that the doctor's and his expert's testimony was false, then the main thing to do is to appeal the dismissal of your case...or rather, first you would make a motion to the court for it to vacate its judgment, based upon the evidence you have which shows that the critical testimony upon which your dismissal was based was false. If the court will not vacate the judgment and reopen the case, you could then appeal the judgment to the appellate courts.Doing the above can be complex, you should get an attorney to represent you, if you don't have one already. Also, when you initially speak with the lawyer about the matter, that will help affirm whether you do in fact have a case worth pursuing--the lawyer will be more objective (as well as more knowledgable) than you in evaluating whether you do have good grounds to vacate the judgment and/or appeal. Good luck.