Effect of balance training on gait with and without dual-tasks in elderly: randomized clinical trial - Santos, Paulo Ferreira dos; Magnani, Paola Errera; Tanaka, Erika Harumi; Rodrigues, Natalia Camargo; Silva, Patrícia; Santiago, Paulo Roberto Pereira; Moraes, Renato de; Abreu, Daniela Cristina Carvalho de (Jacobs Journal of Physiotherapy and Exercise, 2016)