Methodological quality and transparency of clinical practice guidelines for the pharmacological treatment of non-communicable diseases using the AGREE II instrument: a systematic review protocol - Molino, Caroline de Godoi Rezende Costa; Ribeiro, Eliane; Romano-Lieber, Nicolina Silvana; Stein, Airton Tetelbom; Melo, Daniela Oliveira de (Systematic Reviews, 2017)