article_snippet: In one case an American woman given just weeks to live was cleared of advanced blood cancer.
article_snippet: an American woman is still alive three years later, and an American woman doctor says an American woman is not a one-off.
article_snippet: All 15 were expected to die within months given normal treatment.
highlights_snippet: In one case, woman given weeks to live cleared of advanced blood cancer .
  
highlights_snippet: US patient still alive three years later, and doctors say US patient is not a one-off .