What is the optimal way to leerage the expertise of nephrologists gien that there are more than 2000 patients with CKD stages 2 through 5 for eery practicing nephrologist in the United States?

• 如果美国的每位执业肾病医师有超过2000名处于2到5期的患者，那么衡量不同医师专业水准的最佳途径是什么？