The Psychiatry, Mental Health and Addictions Group at Vall d'Hebron Institut of Research (VHIR) participates in the international "http://ec.europa.eu/research/health/medical-research/brain-research/projects/aggressotype_en.html" Aggressotype research programme which was successfully kicked-off in Madrid from November 4 to 6. The PI of the VHIR group is Dr. José Antonio Ramos-Quiroga, who leads different work packages focused on identification of genetic risk factor for aggression and the assessment of treatments for aggression. Aggressotype is a large EU-funded project on pathological aggression in children and adolescents with attention deficit/hyperactivity disorder (ADHD) and conduct disorder (CD). The programme receives 6 Mio Euro from the EU in the next 5 years to study the biological underpinnings of aggression and to develop novel prediction and treatment strategies. With 60 delegates representing 23 academic and private sector partners from 11 countries, Aggressotype is one of the largest programmes on aggression world-wide. Amongst the attending delegates were also a representative of the European patient support group ADHD-Europe, which will take part in the Ethics Board of Aggressotype, and US-based and Dutch leading experts from the Scientific Advisory Board of the Aggressotype programme, who gave inspiring talks during the meeting. In fruitful and lively discussions the meeting delegates finalized plans for a total of 12 comprehensive and highly complementary work packages. These will include molecular and neuroimaging studies of the genetics, epigenetics and neural correlates of aggression. In addition to this, the behavioural components of aggression will be examined, and the Aggressotype programme will also work towards novel pharmacological and non-pharmacological treatment and prevention approaches for pathological aggression. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007– 2013) under grant agreement n° 602805.