1. How Serotonin Level Fluctuation Affects the Effectiveness of Treatment in Irritable Bowel Syndrome
   Ilmaben S Vahora et al, 2020, Cureus CrossRef
2. Linagliptin, a Selective Dipeptidyl Peptidase-4 Inhibitor, Reduces Physical and Behavioral Effects of Morphine Withdrawal
   Joanna Listos et al, 2022, Molecules CrossRef