| AKP | Anterior knee pain |
| CI | Confidence interval |
| CMP | Chondromalacia patellae |
| HA | Hyaluronic acid |
| IQR | Interquartile range |
| MD | Mean difference |
| KOOS | Knee injury and osteoarthritis outcome score |
| MSC | Mesenchymal stem cells |
| NoP | Number of patients |
| OA | Osteoarthritis |
| PFA | Patellofemoral arthritis |
| PRP | Platelet-rich plasma |
| VAS | Visual Analog Scale |
| WOMAC | Western Ontario and McMaster Universities Osteoarthritis Index |
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