Letter: faecal calprotectin and lactoferrin - accurate biomarkers in post-operative Crohn's disease - authors' reply. Letter: biologic therapies are effective for prevention of post-operative Crohn's disease recurrence - authors' reply

Letter: faecal calprotectin and lactoferrin - accurate biomarkers in post-operative Crohn's disease - authors' reply. Letter: biologic therapies are effective for prevention of post-operative Crohn's disease recurrence - authors' reply