This definition of addiction is correct and renders much of current practice in the UK medical and justice systems as erroneous and places large numbers of patients in the category of being willfully misdiagnosed.
This burns out medical workers and renders patients into a bewildered flock at the mercy of giant drug companies and the latest Internet fad.
Reference: http://link.springer.com/book/10.1007/978-0-387-71885-9/page/1