In Vivo Evaluation of 1-O-(4-(2-Fluoroethyl-Carbamoyloxymethyl)-2-Nitrophenyl)-O-β-D-Glucopyronuronate: A Positron Emission Tomographic Tracer for Imaging β-Glucuronidase Activity in a Tumor/Inflammation Rodent Model - Iněs F. Antunes; Hidde J. Haisma; Philip H. Elsinga; Aren van Waarde; Antoon T.M. Willemsen; Rudi A. Dierckx; Erik F.J. de Vries (Molecular Imaging)