Runner Sofia Benfares has been banned for four years for a doping offence by the German Anti-Doping Agency (NADA), one month after her sister, Sara Benfares, was banned for five years. The NADA said on Monday that Sofia Benfares tested positive for the forbidden blood booster erythropoetine (EPO) and all her results between January 11 and her provisional suspension the following month are scrapped. The statement said that Benfares has the right to contest the ruling at a German Court of Arbitration for Sport within 20 days. Benfares, 19, was third over 3,000m at last year’s European junior cha…