Is all pain is treated equally? A multicenter evaluation of acute pain care by age - Hwang, U; Belland, LK; Handel, DA; Yadav, K; Heard, K; Rivera-Reyes, L; Eisenberg, A; Noble, MJ; Mekala, S; Valley, M; Wingel, G; Todd, KH; Morrison, RS (Pain, 2014)