Prospective, randomized, controlled trial assessing the effects of methylene blue for the prevention of hypotension during renal replacement therapy: protocol paper and statistical analysis plan for the BLUE study. - Pontes CDN; Zampieri FG; Figueiredo RC; Pedro RAM; Malbouisson LMS; Cunha RCD; Ramos FJDS; Damiani LP; Besen BAMP; Freitas FGR; Machado FR (Critical care science, 2026)