| CD | celiac disease |
| CF | cystic fibrosis |
| CFTR | cystic fibrosis conductance regulator |
| ChD | Crohn’s disease |
| CMA | cow’s milk allergy |
| H. pylori | Helicobacter Pylori |
| IBD | inflammatory bowel disease |
| IL | interleukin |
| RXR | retinoic acid receptor |
| UC | ulcerative colitis |
| VDR | vitamin D receptor |
| VDRE | vitamin D response element |