PE-050 Neointimal Hyperplasia was Greater between 3 and 8 Months Follow-up after Sirolimus-eluting Stent Implantation in Small Vessels with Calcified Lesions(PE009,Coronary Revascularization, PCI (DES) 2 (IHD),Poster Session (English),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)