title: Is it really free?
authors: R C
authors: RC
authors: Morell
authors: A S
authors: AS
authors: Foreman
authors: R L
authors: RL
authors: Royster
mesh_terms: D000776:Anesthesiology / Q000191:economics / Q000592:standards; D004345:Drug Industry / Q000191:economics / Q000592:standards; D004989:Ethics; D005085:Exhibitions as Topic