1. http://www.ameriburn.org/resources_factsheet.php 2009
2. http://www.niams.nih.gov/health_Info/Bone/Osteoporosis/default.asp 2009
3. World Health Organization http://www.who.int/medicines/ggm/en/index.html 2009
4. Electrochemical actuation of carbon nanotube yarns