The Authors regret that there was a mistake in the affiliation of Jelena Ristić-Ilić published in the final version of the article. The correct affiliation of the Author is given below.
1University Psychiatric Hospital Ljubljana, Centre for the Treatment of Drug Addiction, Grablovičeva 48, 1000 Ljubljana, Slovenia
2University of Ljubljana, Faculty of Medicine, Vrazov trg 2, 1000 Ljubljana, Slovenia