Authors: Iris Niederer; Susi Kriemler; Lukas Zahner; Flavia Bürgi; Vincent Ebenegger; Tim Hartmann; Ursina Meyer; Christian Schindler; Andreas Nydegger; Pedro Marques-Vidal; Jardena J Puder Journal: BMC Public Health Date: 2009-03-31 Impact factor: 3.295