BENGALURU: Doctors at National Institute of Mental Health and Neurosciences (Nimhans) took out a silent march on Friday in solidarity with their colleagues in West Bengal. The Indian Medical Association (IMA) declared Friday as a black day and called for a protest by the medical fraternity against the attack s on two doctors from Nil Ratan Sircar Medical College and Hospital in Kolkata on June 10 by family members of a patient who died. According to doctors, there has been a spike in the number of attacks on them.”Hospitals across the country have closed OPDs and other services. We, however, did not disrupt them to avoid inconveniencing patients,” said Dr Debanj an, senior resident in department of psychiatry, Nim hans. The doctors began their protest after 4.30pm when the OPD closed.