Involving research participants in a pan-European research initiative: the EPAD participant panel experience oleh S. Gregory, E. M. Bunnik, A. B. Callado, I. Carrie, C. De Boer, J. Duffus, K. Fauria, S. Forster, D. Gove, I. Knezevic, A. Laquidain, D. Pennetier, S. Saunders, S. Sparks, J. Rice, C. W. Ritchie, R. Milne