Hibell, Björn (contributor); Molinaro, Sabrina (contributor) - European Monitoring Centre for Drugs and Drug Addiction; … - 2015
The second ESPAD methodology study was carried out in 2013 in four countries (Iceland, Italy, Moldova and Ukraine), following a first study carried out in seven countries in 1998. The goal was to study the validity of the ESPAD questionnaire and to test some possible new questions for the 2015...
