Acknowledgements

This free course was collaboratively written by Cherry Lim, Chris Painter and Ilias Kounatidis, and reviewed by Corrado Minetti, Koen Pouwels, Rachel McMullan, Heidi Hopkins and Dan Whitaker.

Grateful acknowledgement is made to the following sources:

Course image: Katka/Pixabay

Figures 1–4: World Health Organization

Figure 5: Planemad, CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0) via Wikimedia Commons

Every effort has been made to contact copyright holders. If any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity.