PT - JOURNAL ARTICLE AU - Omer F. Bayrak AU - Esra Aydemir AU - Fikrettin Sahin TI - Retinoic acid induced chordomas as a model of differential therapy DP - 2009 Sep 01 TA - Saudi Medical Journal PG - 1236--1237 VI - 30 IP - 9 4099 - http://smj.org.sa/content/30/9/1236.short 4100 - http://smj.org.sa/content/30/9/1236.full SO - Saudi Med J2009 Sep 01; 30