Retraction: “Coaxial electrospinning of P(LLA‐CL)/heparin biodegradable polymer nanofibers: potential vascular graft for substitution of femoral artery”, by Zhai W, Qiu L‐J, Mo X‐M, Wang S, Xu Y‐F, Peng B, Liu M, Huang J‐H, Wang G‐C and Zheng J‐H - Retraction Notice | RetractBase