Doctors at the neurosurgery department in the Government General Hospital have performed four complex surgeries, for free of cost, over the past few months under the chief minister`s comprehensive health insurance scheme. An eight-year old girl with an aneurysm, a 60 year-old man with twitching on the right side of his face, a 40 year-old man with a fractured neck bone and a 15-year-old girl suffering from instability of spine benefited from the scheme.