GENEVA - Syrian government forces have deliberately targeted hospitals, attacked field hospitals with fighter jets and prevented the sick and wounded from receiving medical care, UN war crimes investigators said on Friday.In a special report, they said that the forces of President Bashar Assad had waged a campaign using "the denial of medical care as a weapon of war", especially against people living in opposition-controlled areas."There is also evidence that some anti-government armed groups have attacked hospitals in certain areas," said the independent inquiry led by Brazilian expert Paulo Pinheiro.