I am from Dhaka, Bangladesh, age 45. I was diagnosed with stones in both kidneys. I had undergone a ESWL procedure for my right kidney. But now the crushed stones are not clearing up. Recent x-ray report shows the following - calculi are seen in both renal region, calculi are also noted at the right side of the L2 & L3 vertebrae along the line of right ureter, phlebolith is seen at the right side of the pelvic cavity. I am suffering from bouts of severe pain in the lower back and abdomen. What should be my next course of treatment?