Prediction of Stone Free Rate after Standard Percutaneous Nephrolithotomy using Stone Nephrolithometry Score in Nobel Medical College Teaching hospital – A Prospective Study oleh Ram Sagar Shah, Niraj Thapa, Jit Prakash Shrestha, Ashok Koirala, Kartikesh Mishra, Raju Jayshwal, Sinet Pokharel, Himal Pandey