A placebo-controlled, double-blind, randomized trial of cyclosporine therapy in active chronic Crohn's disease.
Brynskov J, Freund L, Rasmussen SN, Lauritsen K, de Muckadell OS, Williams N, MacDonald AS, Tanton R, Molina F, Campanini MC. N Engl J Med. 1989 Sep 28; 321(13):845-50.