Table 1 Keywords used for search strategy

Tendon/tendon AND

Knee OR patella AND

Jumper’s knee OR Patellar tendinopathy OR Tendinitis OR Tendinosis OR Tendinopath OR tendinopathy AND

Achilles OR Heel OR Tendo calcane OR Tendocalcane OR Tendoachilles OR Tendo achilles OR Achilles tendinitis AND

Ultrasound OR Ultrasonograph OR Sonograph OR UTC OR Ultrasonic imaging OR Diagnostic Ultrasound imaging AND

Risk OR Predict OR Associate OR Relate OR Correlate OR Develop OR Prognosis OR Prospect OR Longit OR OR Future OR Characters OR Grade OR Grading OR Classification OR Classify OR Staging