Athletics-IAAF's Davies steps aside to allow ethics investigation

LONDON, Dec 22 (Reuters) - The chief of staff of the IAAF, world athletics' governing body, said on Tuesday he would step aside from his role to allow an ethics committee to investigate emails he sent regarding Russian doping ahead of the 2013 world championships in Moscow. On Monday, a leaked email sent by the official, Nick Davies, to Papa Massata Diack, the son of former IAAF president Lamine Diack and a former IAAF marketing consultant, discussed a "special dossier" that could be prepared to limit the impact of a series of positive tests by Russian athletes. (Editing by Kevin Liffey)