Comparing Nonrandomized Observational Studies With Randomized Controlled Trials in Cervical Disc Arthroplasty

Spine ◽  
2016 ◽  
Vol 41 (5) ◽  
pp. 419-428 ◽  
Author(s):  
Young Min Jee ◽  
John Seongweon Bak ◽  
Eric Weinlander ◽  
Paul A. Anderson
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