(ANSAmed) – CAIRO, JANUARY 28 – Mohamed elBaradei, one of the leaders of Egypt’s main opposition group, the  National Salvation Front , said three conditions are essential to accept dialogue with President Mohamed Morsi. The president, said elBaradei, must take responsibility for violence in the country, form a national unity government and a politically balanced committee to change the constitution, otherwise talks will be ‘lost time’, he wrote on twitter. (ANSAmed).