Authors: Timothy Flynn; Julie Fritz; Julie Whitman; Robert Wainner; Jake Magel; Daniel Rendeiro; Barbara Butler; Matthew Garber; Stephen Allison Journal: Spine (Phila Pa 1976) Date: 2002-12-15 Impact factor: 3.468
Authors: Jennifer A Klaber Moffett; David A Jackson; Stewart Richmond; Seokyung Hahn; Simon Coulton; Amanda Farrin; Andrea Manca; David J Torgerson Journal: BMJ Date: 2004-12-07