Though the receptors got their name through their association with nicotine, their primary function in the brain is to regulate the release of a variety of neurotransmitters, including acetylcholine, which aids learning and memory.

FORBES: The Nicotine Cure

On World AIDS Day, in memory of those no longer with us and in solidarity with all who carry on the fight, let us pledge to make that vision a reality.

WHITEHOUSE: The White House Honors World AIDS Day 2012

The Mann award is given yearly in memory of Dr Jonathan Mann, an epidemiologist who set up the World Health Organisation's first Aids programme.

BBC: Nobel appeal for rights activist