When we published Suplement 1 to issue 16/2007, we did not provide the conflict of interest information for the authors. They are as follows:

Banaschewski T, Neale BN, Rothenberger A, Roessner V, Comorbidity of tic disorders & ADHD (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:5–14 [the original article can be found at http://dx.doi.org/10.1007/s00787-007-1002-8:

T. Banaschewski is a member of the Advisory Board of the journal, and consultant and/or Speakers bureau of Lilly, Medice, Pfizer, Shire, UCB, Janssen McNeil and Novartis.

B.N. Neale has no conflict of interest to declare.

A. Rothenberger is member of the Advisory Board of the jornal, and/or Speakers bureau of UCB, Lilly, Janssen-Cilag, Medice, Shire, Novartis and Cephalon. He negotiated the financial support with Janssen Cilag for the print of this supplement.

V. Roessner has no conflict of interest to declare.

Freeman RD for the Tourette Syndrome International Database Consortium, Tic disorders and ADHD: answers from a world-wide clinical dataset on Tourette syndrome (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:15–23 [the original article can be found at http://dx.doi.org/10.1007/s00787-007-1003-7]:

R.D. Freeman has no conflict of interest to declare.

Roessner V, Becker A, Banaschewski T, Freeman RD, Rothenberger A for the Tourette Syndrome International Database Consortium, Developmental psychopathology of children and adolescents with Tourette syndrome – impact of ADHD (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:24-35 [the original article can be found at: http://dx.doi.org/10.1007/s00787-007-1004-6]:

V. Roessner, A. Banaschewski, R.D. Freeman, A. Rothenberger as above.

A. Becker has no conflict of interest to declare.

Roessner V, Becker A, Banaschewski T, Rothenberger A, Executive functions in children with chronic tic disorders with/without ADHD: new insights (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:36–44 [the original article can be found at http://dx.doi.org/10.1007/s00787-007-1005-5]:

V. Roessner, A. Becker, T. Banaschweski, A. Rothenberger as above.

Kirov R, Banaschweski T, Uebel H, Kinkelbur J, Rothenberger A, REM-sleep alterations in children with co-existence of tic disorders and attention-deficit/hyperactivity disorder: impact of hypermotor symptoms (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:45–50 [the original article can be found at http://dx.doi.org/10.1007/s00787-007-1006-4]:

T. Banaschewski, A Rothenberger as above.

R. Kirov was supported by the German Research Society (DFG) grants 436 BUL 112/4/02 and 436 BUL 112/35/03.

H. Uebel is Speakers bureau of Lilly Deutschland, Janssen-Cilag.

J. Kinkelbur has no conflict of interest to declare.

Sukhodolsky DG, Leckman JF, Rothenberger A, Scahill L, The role of abnormal neural oscillations in the pathophysiology of co-occurring Tourette syndrome and attention-deficit/hyperactivity disorder (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:51–59 [the original article can be found at http://dx.doi.org/10.1007-007-1007-3]:

A. Rothenberger as above.

D.G. Sukhodolsky and J.F. Leckman have no conflict of interest to declare.

L. Scahill is consultant of Janssen Pharmaceutica, Bristol-Myers Squibb, Neuropharm, Supernus.

Plessen KJ, Royal JM, Peterson BS, Neuroimaging of tic disorders with co-existing attention-deficit/hyperactivity disorder (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:60–70 [the original article can be found at http://dx.doi.org/10.1007-007-1008-2]:

K.J. Plessen was supported by the Center for Child and Adolescent Mental Health, University of Bergen, Norway.

J.M. Royal and B.S. Peterson have no conflict of interest to declare.

Hoekstra PJ, Anderson GM, Troost PW, Kallenberg CGM, Minderaa RB, Plasma kynurenine and related measures in tic disorder patients (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:71–77 [the original article can be found at http://dx.doi.org/10.1007/s00787-007-1009-1]:

P.J. Hoekstra, G.M. Anderson, P.W. Troost, C.G.M. Kallenberg and R.B. Minderaa have no conflict of interest to declare.

Poncin Y, Sukhodolsky, McGuire J, Scahill L, Drug and non-drug treatments of children with ADHD and tic disorders (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:78–88 [the original article can be found at http://dx.doi.org/10.1007-007-1010-8]:

Y. Poncin and J. McGuire have no conflict of interest to declare.

D.G. Sukhodolsky and L. Scahill as above.

Döpfner M, Rothenberger A, Behavior therapy in tic-disorders with co-existing ADHD (2007). Eur Child Adolesc Psychiatry [Suppl 1] 16:89–99 [the original article can be found at http://dx.doi.org/10.1007-007-1011-7 ]:

M. Döpfner is member of the Advisory Board of the journal and/or Speakers bureau of UCB, Lilly, Janssen-Cilag, Medice, Shire, Cephalon, and Consultant of Medice.

A. Rothenberger as above.

The publisher apologises for any inconvenience caused by this omission.