A collaborative care psychosocial intervention to improve late life depression in socioeconomically deprived areas of Guarulhos, Brazil: the PROACTIVE cluster randomised controlled trial protocol - Scazufca, Marcia; Nakamura, Carina Akemi; Peters, Tim J; Henrique, Maiara Garcia; Seabra, Antonio Carlos; La Rotta, Ehidee Gomez; Franzin, Renato Marcelo; Martins, Daniele Ferreira; Ven, Pepijn Van de; Hollingworth, William; Araya, Ricardo (Trials, 2020)