Walsh, Catharine M. (university Of Toronto, Ahmad, Ahmir (st. Mark's Hospital, Saunders, Brian P. (st. Mark's Hospital, Cohen, Jonathan (nyu Grossman School Of Medicine (1) Haycock, Adam (consultant Physician & Gastroenterologist, St Mark's Hospital, London, Uk), Cohen, Jonathan (new York University School Of Medicine), Saunders, Brian P. (st. Mark's Hospital, Harrow), Cotton, Peter B. (medical University Of South (1) Lee, Stan, Stern, Roger, Frenz, Ron, Ditko, Steve (1) Harris, Jonathan (universiity For The Creative Arts, Uk), Roach, Brian (tufts Unversity, Usa) (1) Harris, Jonathan M. (tufts University, Roach, Brian (tufts Unversity (1)