TY - GEN AU - Lin,Chung-Wei Christine AU - Day,Richard O AU - Harris,Ian AU - Maher,Chris G AU - McLachlan,Andrew TI - Comparative efficacy trials with no placebo group cannot determine efficacy SN - 1756-1833 PY - 2015///0821 KW - Amines KW - therapeutic use KW - Analgesics KW - Anti-Inflammatory Agents KW - administration & dosage KW - Cyclohexanecarboxylic Acids KW - Female KW - Humans KW - Low Back Pain KW - drug therapy KW - Male KW - Methylprednisolone KW - Radiculopathy KW - gamma-Aminobutyric Acid N1 - Publication Type: Letter; Comment UR - https://doi.org/10.1136/bmj.h3292 ER -