Rapamycin and inulin for booster vaccine response stimulation (RIVASTIM)—rapamycin: study protocol for a randomised, controlled trial of immunosuppression modification with rapamycin to improve SARS-CoV-2 vaccine response in kidney transplant recipients - Tunbridge, Matthew; Perkins, Griffith B.; Singer, Julian; Salehi, Tania; Ying, Tracey; Grubor-Bauk, Branka; Barry, Simon; Sim, Beatrice; Hissaria, Pravin; Chadban, Steven J.; Coates, P. Toby (Trials, 2022)