By Ryan Fahey Dame Esther Rantzen has called for MPs to get a free vote on Britain’sassisted dying rules – as we revealed 71% of Mirror readers want the terminally-ill to be allowed to die with dignity. But those against assisted dying claim it’s a ‘slippery slope’ to non-voluntary euthanasia, puts an extra pressure on doctors and could see some poorer patients feeling pressured to opt for it to lessen the burden on their family. Just 19 countries have made some form of assisted dying legal, meaning dozens are still unsure. So just how are different countries handling the difficult issue? Neth…