Doctors treating migraine sufferers often order medicines from a group of drugs known as triptans.

VOA: special.2011.05.03

The cancer scientists say this cancer often begins with an infection caused by a bacteria called Helicobactor Pylori, also known as H-Pylori.

VOA: standard.2010.05.12

And with higher sea levels, heavy rains and massive tides known as storm surges, which often accompany tropical storms, can do unexpected damage.

VOA: standard.2009.11.09