added to

Timbuktu was a major centre of Islamic learning between the 13th and 17th Centuries and was added to the Unesco world heritage list in 1988.

The attacks have added to the humanitarian crisis in a region reeling from a years-long civil war and four years of extreme drought exacerbated by climate change.

Currently, the only approved therapy for children with achondroplasia in Australia is vosoritide, a daily injection, which was added to the PBS last year.

That study also showed a significant increase in survival when high-dose, IV vitamin C was added to standard of care chemotherapy and radiation.

Fluoride - a naturally occurring mineral recognised to protect teeth against decay - is added to water supplies in many countries, including the US, where around 63% of the population have fluoridated water.