Percutaneous Coronary Intervention of Functionally Nonsignificant Stenosis: 5-Year Follow-Up of the DEFER Study - Pijls, Nico H.J.; van Schaardenburgh, Pepijn; Manoharan, Ganesh; Boersma, Eric; Bech, Jan-Willem; van’t Veer, Marcel; Bär, Frits; Hoorntje, Jan; Koolen, Jacques; Wijns, William; de Bruyne, Bernard (Journal of the American College of Cardiology (JACC), 2007)