2021. Supplementation of curcumin and piperine plus standard therapy to prevent exacerbations in patients with Chronic Obstructive Pulmonary Disease (CUPISCO TRIAL: CUrcumin and PIperine Supplementation for COpd). A study protocol. Principles and Practice of Clinical Research. 6, 4 (Feb. 2021). DOI:https://doi.org/10.21801/ppcrj.2020.64.4.