Coimbatore (Tamil Nadu), Apr 28 (ANI): Doctors from various associations in Tamil Nadu staged a protest against the State Govt. to retain service quota for the doctors in service. Hundreds of doctors participated in the protest which is going on from the past 8 days. On Thursday, the doctors conducted a 'Road Roko' protest to press their demands. Doctors alleged that the government of Tamil Nadu has failed to fulfill their demands. Hundreds of doctors were arrested by the city police during the protest.