PT - JOURNAL ARTICLE AU - Keller, David L. TI - Essential tremor, beta-blockers, and calcium channel blockers (December 2011) AID - 10.3949/ccjm.79c:04004 DP - 2012 Apr 01 TA - Cleveland Clinic Journal of Medicine PG - 242--242 VI - 79 IP - 4 4099 - http://www.ccjm.org/content/79/4/242.1.short 4100 - http://www.ccjm.org/content/79/4/242.1.full SO - Cleve Clin J Med2012 Apr 01; 79