title: Letter to the Editor concerning "Does whole-spine lateral radiograph with clavicle positioning reflect the correct cervical sagittal alignment?" by Park SM et al. (Eur Spine J 24(1):57-62).
authors.affiliation: Department of Orthopedics, Pediatric Orthopedics and Traumatology, The Centre of Postgraduate Medical Education in Warsaw, Konarskiego 13, 05-400, Otwock, Poland. marcintyrak@gmail.com.
authors.forename: Marcin
authors.initials: M
authors.lastname: Tyrakowski
authors.affiliation: Department of Orthopedics, Pediatric Orthopedics and Traumatology, The Centre of Postgraduate Medical Education in Warsaw, Konarskiego 13, 05-400, Otwock, Poland.
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Czubak
authors.affiliation: Department of Orthopedic Surgery, University of Illinois at Chicago, 835 South Wolcott Ave, Room E-270, Chicago, IL, 60612, USA.
authors.forename: Kris
authors.initials: K
authors.lastname: Siemionow