RT Journal Article SR Electronic T1 Alar and Transverse Ligament Calcification and Crown Dens JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1251 OP 1251 DO 10.3899/jrheum.160102 VO 43 IS 6 A1 BRUCE ROTHSCHILD YR 2016 UL http://www.jrheum.org/content/43/6/1251.abstract AB