Which Nobel laureates have given up their Peace Prize in the past?

Russian journalist Dmitry Muratov and former Argentina minister Carlos Saavedra Lamas are among those who gave up their Nobel Peace Prize medal in the past. Former United Nations Secretary-General Kofi Annan's medal was donated to the UN's office after his death. This comes as Venezuelan opposition leader Maria Corina Machado gave her Peace Prize to US President Donald Trump.