Table 2. Genes found in ARF/RHD studies. The country and number of participants are indicated.
| Author, year | Country | Sample size | Genes |
| Gupta et al. 201441-43 | India | 400 RHD patients | PTPN22 polymorphisms |
| 300 controls | JAK/STAT polymorphisms | ||
| 300 RHD patients | ACE I/D polymorphisms | ||
| 200 controls | |||
| Aksoy et al. 201149 | Turkey | 120 RHD | PTPN22 R620W gene polymorphism |
| 160 controls | |||
| Mahomed et al. 201044 | Saudi Arabia | 80 RHD patients | TNF-α polymorphisms |
| 50 controls | |||
| Kamal et al. 201047 | Egypt | 73 RHD patients | TGF-β1 polymorphisms |
| 55 controls |