article_snippet.sent: But at the moment there isn't good evidence from clinical trials to prove that they can safely and effectively treat cancer in patients. '
article_snippet.sent: Researchers are collecting patients' experiences to build a picture of whether these treatments are helping or not, although this is weak evidence compared to properly-run clinical trials. '
article_snippet.sent: But at the moment there isn't good evidence from clinical trials to prove that they can safely and effectively treat cancer in patients. '
article_snippet.sent: Researchers are collecting patients' experiences to build a picture of whether these treatments are helping or not, although this is weak evidence compared to properly-run clinical trials. '