NEW : Last week , Dr. Eyad El-Sarraj , a psychiatrist who runs Gaza 's mental health program , said Gaza was headed for `` a major humanitarian disaster '' unless the fighting ended soon . Doctor : I have a new patient. NEW : At least 507 Palestinians have been killed in the military operation . Doctor : `` people were dying before they got treatment '' Some 25 trucks bearing aid could not cross the Gaza-Egypt border on Sunday .
NEW : Doctor : I have a new patient. NEW : At least 507 Palestinians have been killed in the military operation . Doctor : `` people were dying before they got treatment '' Some 25 trucks bearing aid could not cross the Gaza-Egypt border on Sunday .