Int. j. mol. sci. Int. j. mol. sci. High-Performance Thin-Layer Chromatography-Densitometry-Tandem ESI-MS to Evaluate Phospholipid Content in Exosomes of Cancer Cells Sancho-Albero María Jarne Carmen Saviróon María Martín-Duque Pilar Universidad de Zaragoza Membrado Luis Cebolla Vicente L. Santamaría Jesús Universidad de Zaragoza 2022 research-article