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Laine, Christine and Horton, Richard and DeAngelis, Catherine D. and Drazen, Jeffrey M. and Frizelle, Frank A. and Godlee, Fiona and Haug, Charlotte and Hébert, Paul C. and Kotzin, Sheldon and Marušić, Ana and Sahni, Peush and Schroeder, Torben V. and Sox, Harold C. and Van Der Weyden, Martin B. and Verheugt, Freek W. A. (2007) Clinical trial registration: looking back and moving ahead. Croatian Medical Journal, 48 (3). pp. 289-291. ISSN 0353-9504