Paediatric heart surgeon Issam al-Rassi (R) holds hands with nine-month-old Syrian refugee Amena al-Helou prior to operating on her heart at the Hammoud Universal Hospital in the southern Lebanese city of Sidon on September 22, 2106. 

Amena is just one of dozens of refugees treated each year by Lebanon's leading paediatric heart surgeon Rassi, who each week sets aside a day to operate on Syrian and Palestinian refugees.

 / AFP / Mahmoud ZAYYAT / TO GO WITH AFP STORY BY SARA HUSSEIN        (Photo credit should read MAHMOUD ZAYYAT/AFP/Getty Images)