ISLAMABAD - Former President Asif Ali Zardari on Tuesday expressed grave concern over the deteriorating health of former Federal Minister Dr Asim Hussain and called for providing him best medical care. Dr Asim Hussain was taken to cardio unit of the Jinnah Hospital when he suffered heart attack during custody of Rangers on charges of promoting militancy. “Grilling Dr Asim Hussain on unsubstantiated charges of terrorism and abetting militants is a grave misuse of administrative, investigative and judicial processes,” the former President said.