Title: Comparative effectiveness of second-line biological therapies for ulcerative colitis and
Crohn’s disease in patients with prior failure of anti-tumour necrosis factor treatment
Version: 4 Date: 22 Jan 2022
Reviewer's report:
I think the article is clinically relevant, but, as you mention, the sample size is  small. Although
retrospective, well done and structured. Please correct "pruritis" on page 8, second parragraph.
Title: Comparative effectiveness of second-line biological therapies for ulcerative colitis and
Crohn’s disease in patients with prior failure of anti-tumour necrosis factor treatment
Version: 4 Date: 22 Jan 2022
Reviewer's report:
I think the article is clinically relevant, but, as you mention, the sample size is  small. Although
retrospective, well done and structured. Please correct "pruritis" on page 8, second parragraph.
Please review this paper.
user
Title: Comparative effectiveness of second-line biological therapies for ulcerative colitis and
Crohn’s disease in patients with prior failure of anti-tumour necrosis factor treatment
Version: 4 Date: 22 Jan 2022
Reviewer's report:
I think the article is clinically relevant, but, as you mention, the sample size is  small. Although
retrospective, well done and structured. Please correct "pruritis" on page 8, second parragraph.
assistant