As such, there is an immense need for the development of effective treatments. Worldwide, medical personnel and researchers are making great efforts to develop treatments that will fulfil this need. The two most recent Cochrane reviews on prevention and treatment (2009, 2011) concluded that as of yet there is not a defined long-term effective and sustainable intervention thus multiple research groups are investigating their own treatment approaches. As of June 2013 the American Medical Association officially recognised obesity as a disease and this decision will lead to more focused approach around the world with regard to an individual access to treatment and in relation to the type of treatment that they receive.