Four years ago, the labor agency estimated that more than twelve million people were in some form of forced labor.

VOA: special.2009.06.08

The WHO report says an estimated to have some form of cancer this year.

VOA: special.2009.01.13

Yoga is big business: An estimated 22 million Americans practice some form of the ancient Indian discipline.

FORBES: Yoga's Latest Craze Could Make You Rich While You Twist

So do many of Turkey's estimated 15m Alevis, who practise an idiosyncratic form of Islam: they do not pray in mosques, they are not teetotal and their women do not cover their heads.

ECONOMIST: Turkey��s future

Between 22% and 40% of people with NHL are estimated to have the follicular or low-grade form.

BBC: The drug targets cancer cells directly