Corrigendum: Variations in circulating levels of angiopoietin-2 over time are predictive of ramucirumab–paclitaxel therapy outcome in advanced gastric cancer: results of prospective study - D’Alessandro, Rosalba; Refolo, Maria Grazia; Schirizzi, Annalisa; De Leonardis, Giampiero; Donghia, Rossella; Guerra, Vito; Giannelli, Gianluigi; Lolli, Ivan Roberto; Laterza, Maria Maddalena; De Vita, Ferdinando; Messa, Caterina; Lotesoriere, Claudio (Frontiers in Oncology, 2023)