TY - JOUR T1 - MEchanical therapeutic agencies.the salt of the earth. Y1 - 2002/10/16 N1 - 10.1001/jama.288.15.1920 JO - JAMA SP - 1920 EP - 1920 VL - 288 IS - 15 N2 - SN - 0098-7484 M3 - doi: 10.1001/jama.288.15.1920 UR - http://dx.doi.org/10.1001/jama.288.15.1920 ER -