WP2 Observations in experimental and natural settings Work Package 2a: ethnographic observations “People power or pester power”? YouTube as a forum for the generation of evidence and patient advocacy. People power or pester power? Multiple sclerosis, YouTube, and the liberation procedure. Work Package 2b: observational and experiemental studies An engagement framework for understanding the communication needs of different health groups. How do people with asthma use Internet sites containing patient experiences?