Efficacy of xyloglucan, pea protein and chia seed powder for patients with constipation-predominant irritable bowel syndrome: a randomised placebo-controlled trial - Bradic, S; Malik, W; Wray, J; Ki Tai, K; Casella, S; Bramati, G; Karnani, B (Zeitschrift für Gastroenterologie, 2025)