When we published Supplement 1 to issue 15/2006, we did not provide the conflict of interest information for the authors. They are as follows:

Rothenberger A, Coghill D, Döpfner M, Falissard B, Steinhausen HC, Naturalistic-observational study in the framework of ADHD health care. Eur Child Adolesc Psychiatry [Suppl 1] 15: 1–3 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1001-1]:

A Rothenberger is Co-Editor of the journal and Advisor and Speaker of UCB, Eli Lilly, Janssen-Cilag, Medice, Shire, Novartis.

D Coghill is Advisory Board member of Cephalon, Eli Lilly, Janssen-Cilag, Shire, UCB, Celltech and gets Research Funding from Eli Lilly and Janssen-Cilag.

M Döpfner is Advisory Board member of Eli Lilly, Janssen-Cilag, Shire, UCB, Medice, Novartis. He has Research Contracts with Eli Lilly, Janssen-Cilag, Shire, UCB, Medice, Novartis.

B Falissard is Advisor and Speaker of Sanofi-Avensis, Pierre Fabre, BMS, Lundbeck, Servier, GSK.

HC Steinhausen is Advisor and Speaker of Eli Lilly, Janssen-Cilag, Novartis, Medice, Shire, UCB.

Preuss U, Ralston SJ, Baldursson G, Falissard B, Lorenzo MJ, Rodrigues-Pereira R, Vlasveld L, Coghill D, Study design, baseline patient characteristics and intervention in a cross-cultural framework: results from the ADORE-study. Eur Child Adolesc Psychiatry [Suppl 1] 15: 4–14 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1002-0]:

B Falissard and D Coghill as above.

U Preuss is Advisor of Eli Lilly, Swiss Medic, Janssen-Cilag, Lundbeck, Vifor Pharma and Speaker of Eli Lilly, Pfizer, Astra Zenece, Swiss Medic, Novartis, Janssen-Cilag, Lundbeck, Solvay Pharma, Vifor Pharma. He got Research funding of Eli Lilly, Janssen-Cilag, Lundbeck, Solvay Pharma, Vifor Pharma and Travel support of Eli Lilly, Astra Zeneca, Novartis, Janssen-Cilag, Lundbeck, Vifor Pharma.

SJ Ralston is affiliate of Lilly.

G Baldursson is Advisor for ADORE-Study (Lilly).

MJ Lorenzo is affiliate of Lilly.

R Rodrigues-Pereira has no conflict of interest to declare.

L Vlasveld is Advisor of Janssen-Cilag, UCB, Shire, Eurocept.

Novik TS, Hervas A, Ralston S, Dalsgaard S, Rodrigues-Pereira R, Lorenzo MJ, Influence of gender on Attention-Deficit/Hyperactivity Disorder in Europe – ADORE. Eur Child Adolesc Psychiatry [Suppl 1] 15: 15–24 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1003-z]:

S Ralston, R Rodrigues-Pereira and MJ Lorenzo as above.

TS Novik is Advisory Board member of Lilly and has research contract with Lilly. She is Speaker of Lilly, Janssen Cilag, Lundeck, GlaxoSmithKline and gets Travel support of Janssen-Cilag, Bristol Myers Squibb.

A Hervas is Member of the Advisory Board and Speaker of Eli Lilly and Janssen-Cilag.

S Dalsgaard is Advisor for Eli Lilly, Speaker for Eli Lilly, Janssen Cilag and Novartis, he gets Travel support from Eli Lilly and Novartis

Steinhausen HC, Novik TS, Baldursson GP, Curatolo P, Lorenzo MJ, Rodrigues-Pereira R, Ralston SJ, Rothenberger A, Co-existing psychiatric problems in ADHD in the ADORE cohort. Eur Child Adolesc Psychiatry [Suppl 1] 15: 25–29 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1004-y]:

HC Steinhausen, TS Novik, G Baldursson, MJ Lorenzo, R Rodrigues-Pereira, SJ Ralston, A Rothenberger as above.

P Curatolo is Advisory Board Member of Lilly and gets grants for clinical trials of Lilly.

Coghill D, Spiel G, Baldursson G, Döpfner M, Lorenzo MJ, Ralston SJ, Rothenberger A, Which factors impact on clinical-rated impairment in children with ADHD? Eur Child Adolesc Psychiatry [Suppl 1] 15: 30–37 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1005-x]:

D Coghill, G Baldursson, M Döpfner, MJ Lorenzo, SJ Ralston, A Rothenberger as above.

G Spiel is Advisor for ADORE-Study (Lilly).

Riley AW, Spiel G, Coghill D, Döpfner M, Falissard B, Lorenzo MJ, Preuss U, Ralston SJ, Factors related to the Health-Related Quality of Life (HRQoL) among children with ADHD in Europe at entry of treatment. Eur Child Adolesc Psychiatry [Suppl 1] 15: 38–45 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1006-9]:

G Spiel, D Coghill, M Döpfner, B Falissard, MJ Lorenzo, U Preuss, SJ Ralston as above.

AW Riley is Advisory Board Member and Speaker of Eli Lilly.

Döpfner M, Steinhausen HC, Coghill D, Dalsgaard S, Poole L, Ralston SJ, Rothenberger A, Cross-cultural reliability and validity of ADHD assessed by the ADHD Rating Scale in a pan-European study. Eur Child Adolesc Psychiatry [Suppl 1] 15: 46–55 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1007-8]:

M Döpfner, HC Steinhausen, D Coghill, S Dalsgaard, SJ Ralston and A Rothenberger as above.

L Poole is affiliate of Lilly.

Becker A, Steinhausen HC, Baldursson G, Dalsgaard S, Lorenzo MJ, Ralston SJ, Döpfner M, Rothenberger A, Psychopathological screening of children with ADHD: Strengths and Difficulties Questionnaire in a pan-European study. Eur Child Adolesc Psychiatry [Suppl 1] 15: 56–62 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1008-7]:

HC Steinhausen, G Baldursson, S Dalsgaard, MJ Lorenzo, SJ Ralston, M Döpfner and A Rothenberger as above.

A Becker has no conflict of interest to declare.

Riley AW, Coghill D, Forrest CB, Lorenzo MJ, Ralston SJ, Spiel G, Validity of the health-related quality of life assessment in the ADORE study: Parent Report Form of the CHIP-Child Edition. Eur Child Adolesc Psychiatry [Suppl 1] 15: 63–71 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1009-6]:

AW Riley, D Coghill, Lorenzo MJ, Ralston SJ, Spiel G as above.

CB Forrest has no conflict of interest to declare.

Riley AW, Lyman LM, Spiel G, Döpfner M, Lorenzo MJ, Ralston SJ, The Family Strain Index (FSI). Reliability, validity, and factor structure of a brief questionnaire for families of children with ADHD. Eur Child Adolesc Psychiatry [Suppl 1] 15: 72–78 [the original article can be found at http://dx.doi.org/10.1007/s00787-006-1010-0]:

AW Riley, G Spiel, M Döpfner, MJ Lorenzo, SJ Ralston as above.

LM Lyman has no conflict of interest to declare.