Robalo, LinaCruz, Eduardo B.Nunes, C2018-03-022018-03-0220152165-7025PURE: 2197671PURE UUID: 031d41da-7328-4726-8b02-8cd153b96885http://hdl.handle.net/10362/315961088683engEpidemiology of non-specific back pain in children and adolescentsjournal article10.4172/2165-7025.1000266a systematic review of observational studies