RT Journal Article SR Electronic T1 Retropharyngeal Calcific Tendinitis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1546 OP 1547 DO 10.3899/jrheum.081161 VO 36 IS 7 A1 ROBERT M. SIWIEC A1 DAVID J. KUSHNER A1 JEANETTE L. MORRISON YR 2009 UL http://www.jrheum.org/content/36/7/1546.abstract AB