Ahmedabad: 30 members of Rajasthan State Mine Labour Union came to stage a protest at the National Institute of Occupational Health (NIOH) in the city on Tuesday. They are demanding that the institute release the report of test conducted by it on asbestos miners. Rana Sengupta, managing trustee of Mines Labour Protection Campaign (MLPC) said that 19 out of 164 workers studied by NIOH have died already.