Spine Disorders, Department of Spine Disorders and Pediatric Orthopedics, Poznan University of Medical Sciences, Poznan, Poland (Dr Janusz), Department of Spine Disorders and Pediatric Orthopedics, Poznan University of Medical Sciences, Poznan, Poland (Drs Kotwicki and Shadi), Poznan University of Medical Sciences, Poznan, Poland (Mss Pikulska, Kapska, Kaniowska, Darcz, Ekwińska, and Stachowiak and Mr Bykowski).
Correspondence: Piotr Janusz, MD, PhD, Spine Disorders Unit, Department of Spine Disorders and Pediatric Orthopedics, Poznan University of Medical Sciences, 28 Czerwca 1956r nr 135, 61-545 Poznan, Poland ([email protected]).
Grant Support: The study was funded by Internal Research Funding of the Poznan University of Medical Sciences.
The work was during realization while Dagmara Pikulska, Natalia Kapska, Marta Kaniowska, Marta Darcz, Weronika Ekwińska, and Emilia Stachowiak were students in Poznan University of Medical Sciences, Poland (master's degree).
The manuscript was completed while Natalia Kapska and Marta Kaniowska were students in Poznan University of Medical Sciences, Poland.
Supplemental digital content is available for this article. Direct URL citation appears in the printed text and is provided in the HTML and PDF versions of this article on the journal's Web site (www.pedpt.com).
The authors declare no conflicts of interest.
