Design, history and results of the Thiazolidinedione Intervention with vitamin D Evaluation (TIDE) randomised controlled trial. by Punthakee, Z, Bosch, J, Dagenais, G, Diaz, R, Holman, R, Probstfield, J, Ramachandran, A, Riddle, M, Rydén, L, Zinman, B, Afzal, R, Yusuf, S, Gerstein, H