Despite countless industry efforts to improve efficiency in the planning and execution of clinical trials, 80 per cent of studies are delayed in their completion by a third or more of their intended durations. Patient enrolment, or lack thereof, is frequently cited as the primary reason for clinical trial delays. Nicholas Spittal at Chiltern International discusses the widespread adoption of new technologies and services such as social media, electronic medical records, and remote data capture, which bring many opportunities to boost protocol participation, but also introduce many new challenges.
http://jforcs.com/jcs/wp-content/uploads/edd/2012/09/Pages-from-JCS-Volume4Issue5-31.pdf