To treat my patients, I drive down the only road leading into my city, before sunrise, with the headlights of my car turned off.

I travel Castello road knowing that dozens of people like me have died here. I do this because it is the only way to reach the children in my hospital.

Now, the road is closed. My city is fully besieged. And without your help, my young patients will soon be dead.

Last week, the Syrian regime, backed by Russian bombers, closed Castello road and trapped 300,000 men, women and children in Aleppo.