Occurrence of Fibrotic Tumor Vessels in Grade I Meningiomas Is Strongly Associated with Vessel Density, Expression of VEGF, PlGF, IGFBP-3 and Tumor Recurrence. - Hess K; Spille DC; Adeli A; Sporns PB; Zitta K; Hummitzsch L; Pfarr J; Stummer W; Brokinkel B; Berndt R; Albrecht M (Cancers, 2020)