![](https://giornaleitalianodinefrologia.it/wp-content/uploads/sites/3/2018/01/fig-4-Small.jpg?x85047)
fig 4 (Small)
Figure 4. The opening page of Alwall’s little-known paper of 1952 (5) about his pioneering needle aspiration renal biopsies performed in 1944.
Figure 4. The opening page of Alwall’s little-known paper of 1952 (5) about his pioneering needle aspiration renal biopsies performed in 1944.