MP44-03 ULTRASOUND-ONLY PERCUTANEOUS NEPHROLITHOTOMY IS SAFE AND EFFECTIVE COMPARED TO FLUOROSCOPY-DIRECTED PCNL. (May 2022) - Hakam, Nizar; Hosier, Gregory; Cortez, Xavier; Hamouche, Fadl; Charondo, Leslie; Yang, Heiko; Chan, Carter; Chang, Kevin; Bayne, David; Stoller, Marshall; Chi, Thomas