PT - JOURNAL ARTICLE AU - Leonard Calabrese TI - Introduction AID - 10.3949/ccjm.78.s2.01 DP - 2011 Nov 01 TA - Cleveland Clinic Journal of Medicine PG - S2--S2 VI - 78 IP - 11 suppl 2 4099 - http://www.ccjm.org/content/78/11_suppl_2/S2.short 4100 - http://www.ccjm.org/content/78/11_suppl_2/S2.full SO - Cleve Clin J Med2011 Nov 01; 78