But Professor Nazrul says the two are able to prolong their feud because no one stands up to them.

NPR: Upheaval Marks Another Election in Bangladesh

Avastin did not prolong life when used as a first treatment for people with brain tumors like the one U.S. Sen.

NPR: Avastin Fails Studies In New Brain Tumor Patients

In a statement, one of his sons said, under Islam generally, "we believe that you prolong life... and that you actively take every step to so do".

BBC: Manchester

One is a living will, stating what you do and don't want done to prolong your life.

FORBES: Healthy Precautions

In only one of the trials did the use of stem-cell support and high-dose chemotherapy appear to prolong life more effectively than conventional low-dose treatment.

ECONOMIST: Breast cancer

Bluntly put, the recent escalation of hostilities will not only prolong the deadly conflict in Syria, but has now made it an open-ended war by proxy -- one with major potential repercussions for regional and international security and peace.

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