The Comrades Marathon Association (CMA) has confirmed that four members of its board have resigned with immediate effect.The members include CMA chair Mqondisi Ngcobo, vice-chair Leslie Burnard and board members Kerwin Basson and Pumlani Ntuli.In a brief statement, Ngcobo said: “I am very grateful to the CMA board, staff, sponsors and volunteers who have supported the work of the association in what has been some stressful circumstances. The past few weeks have taken a toll on the members of the association, and I empathise with those who have been at the coalface dealing with these…