Singh Kern, Samartzis Dino, Pennington William T, Wise Jeffrey, An Howard S
Department of Orthopedic Surgery, Rush-Presbyterian-St Luke's Medical Center, 1725 W Harrison St, Ste 1063, Chicago, IL 60612, USA.
Orthopedics. 2006 Mar;29(3):265-7. doi: 10.3928/01477447-20060301-16.