TECHNICAL SUCCESS RATE OF INTRA-ARTICULAR KNEE INJECTION- COMPARISON BETWEEN ULTRASOUND-GUIDED AND PALPATION-GUIDED INJECTION USING RADIOGRAPHIC DEPICTION OF INTRA-ARTICULAR AIR CONTRAST AS A REFERENCE. (April 2022) - Guermazi, A.; Hayashi, D.; McLennan, C.; Crema, M.; Jarraya, M.; Raghavan, S.; Roemer, F.W.