(ABC News) – Hamza Khatib is one of about 29 doctors left in the besieged part of east Aleppo, Syria. He works at one of only five hospitals that remain in service in the war-torn eastern part of the city, home to an estimated 275,000 people desperately in need of clean water, food and medical supplies. On a normal day, his hospital receives about 50 people who have been injured by airstrikes, shootings or other types of attacks. When airstrikes hit near the hospital, they treat about 100 people. “We see everything from the simplest wounds to people losing limbs,” Khatib, who is using a pseudonym for safety reasons, told ABC News in Arabic.