Conversion from azathioprine / prednisone to azathioprine / cyclosporin promotes catch-up growth in pediatric renal allograft recipients - David Neto, E; Vilares, S; Lando, V; Nicolau, Wilian; Ianhez, L E; Sabbaga, E; Wajchenberg, B L; Arap, Sami (Clinical Transplantation, 1990)