Silva, J. F., R. E. Liebano, J. B. Corrêa, R. Y. Matsushita, and E. Y. Nakano. “ANALYSIS OF THE TIME TO RELIEVING PAIN IN PATIENTS WITH CHRONIC NON-SPECIFIC LOW BACK PAIN VIA COX PROPORTIONAL HAZARD MODEL”. Ciência E Natura, vol. 39, no. 2, May 2017, pp. 233-4, doi:10.5902/2179460X24102.