In Shelkovsky district of Chechen republic 20 people, including 14 children, were discharged from hospitals. No new cases of illness were registered, informed in Southern regional center of Emergency Ministry. "43 people stay in republican hospitals, 31 of them are children", - said the source. Total amount of hospitalized people has reached 75 people, including 57 children. The causes of mass disease stayed uncertain for a long time. On Friday committee, headed by vice-director of Institute of forensic psychiatry Zurab Kikalidze, diagnosed the patients. "Patients have conversional cramps", - announced Kikalidze. The cause of the disease is high psychological and emotional effort. In opinion of Kikalidze, mass spread of the illness was initiated by effect of psychological infection. Kikalidze think that long-term measures are needed for the solution of the problem. "Conception of psychological and social rehabilitation of the population must be developed", - he said.