Development of the Paris definition of early Crohn's disease for disease-modification trials: Results of an international expert opinion process

Laurent Peyrin-Biroulet, Vincent Billioud, Geert D'Haens, Remo Panaccione, Brian Feagan, Julian Panés, Silvio Danese, Stefan Schreiber, Haruhiko Ogata, Toshifumi Hibi, Peter D.R. Higgins, Laurent Beaugerie, Yehuda Chowers, Edouard Louis, Flávio Steinwurz, Walter Reinisch, Paul Rutgeerts, Jean Frédéric Colombel, Simon Travis, William J. Sandborn