By Stephanie Nebehay LAUSANNE, Switzerland (Reuters) - The remains of Palestinian leader Yasser Arafat showed test results consistent with polonium poisoning and should lead to a judicial investigation even if they were not absolute proof that he died that way, Swiss experts said on Thursday. The two forensic experts were part of an international team that opened Arafat's grave in the West Bank city of Ramallah last November and took samples from his body to see if there was evidence he was poisoned with the radioactive element.