Serial Changes of Neointimal Hyperplasia and Coverage on the Drug Eluting Stent Struts Crossing the Side-branch Vessels Evaluated by Optical Coherence Tomography Imaging. [ Yoshihisa Kinoshita, Tairo Kurita, Kenya Nasu, Euihong Ko, Tsuyoshi Ito, Maoto Habara, Mitsuyasu Terashima, Takahiko Suzuki ]