The BBC World Service is the world's oldest international broadcaster, offering radio news, current affairs, and cultural programming to audiences worldwide.

A biopsy is a medical procedure in which a small sample of tissue or cells is taken from a person's body for examination under a microscope.

Endoscopy is a medical procedure that allows doctors to visualize and examine the inside of a patient's body using an instrument called an endoscope.

Helicobacter pylori is a type of bacteria that infects the stomach lining and is known to be a major cause of various gastric diseases including gastritis, peptic ulcers, and stomach cancer.

The Wikipedia page on medicine provides an overview of the field of medicine, covering various aspects such as its history, branches, education, research, practice, and ethics.

Microbiology is the scientific study of microorganisms, which are tiny, single-celled organisms that cannot be seen with the naked eye.

The Nobel Foundation is a Swedish institution founded in 1900 by the will of Alfred Nobel, the inventor of dynamite.