By Alasdair Fotheringham BUSSETO, Italy, May 17 (Reuters) – Defending Giro d’Italia champion Ryder Hesjedal has withdrawn from this year’s race, the Canadian’s Garmin-Sharp team announced before the start of Friday’s stage 13. Hesjedal had slipped to 38th place after 12 stages, 32 minutes and 55 seconds down on overall leader Vincenzo Nibali of...
