Accepted for Publication: May 15, 2012.
Published Online: November 5, 2012. doi:10.1001/jamapediatrics.2013.415
Author Contributions: Dr Rautava had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Rautava, Häkkinen, Lehtonen, Andersson, Hallman, Helle, Korvenranta, Leipälä, Linna, Sankilampi, and Tammela. Acquisition of data: Rautava, Eskelinen, Häkkinen, Peltola, and Tammela. Analysis and interpretation of data: Rautava, Lehtonen, Andersson, Gissler, Hallman, Helle, Korvenranta, Leipälä, Malmivaara, Sankilampi, Tammela, and Tommiska. Drafting of the manuscript: Rautava, Lehtonen, Malmivaara, and Tammela. Critical revision of the manuscript for important intellectual content: Rautava, Eskelinen, Häkkinen, Lehtonen, Andersson, Gissler, Helle, Korvenranta, Leipälä, Linna, Peltola, Sankilampi, Tammela, and Tommiska. Statistical analysis: Rautava, Häkkinen, Gissler, and Hallman. Obtained funding: Rautava, Lehtonen, and Korvenranta. Administrative, technical, and material support: Gissler, Hallman, and Peltola. Study supervision: Lehtonen, Andersson, Korvenranta, Malmivaara, Sankilampi, and Tammela.
The PERFECT Preterm Infants Study Group includes Sture Andersson, MD, PhD; Janne Eskelinen, MSocSc; Mika Gissler, DrPhil; Mikko Hallman, MD, PhD; Emmi Helle, MD, PhD, MSc(Econ); Unto Häkkinen, MSc, PhD; Heikki Korvenranta, MD, PhD; Liisa Lehtonen, MD, PhD; Jaana Leipälä, MD, PhD; Miika Linna, PhD; Antti Malmivaara, MD, PhD; Mikko Peltola, MSc; Liisi Rautava, MD, PhD; Ulla Sankilampi, MD, PhD; Outi Tammela, MD, PhD; and Viena Tommiska, MD, PhD.
Conflict of Interest Disclosures: Dr Lehtonen has received financial support for conferences from Abbott, Nycomed, and Ferring. Dr Tammela has received financial support for conferences from Nycomed.
Funding/Support: This study was supported by grants from the Finnish Academy, the Finnish Innovation Fund SITRA, Helsinki University Central Hospital EVO Funding, and Turku University Hospital EVO Funding.
Role of the Sponsors: The funding sources for this study had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: Jaakko Matomäki, MSc, assisted with the statistics.