cancers Review Emerging Lab-on-a-Chip Approaches for Liquid Biopsy in Lung Cancer: Status in CTCs and ctDNA Research and Clinical Validation Ângela Carvalho 1,2,3,* , Gabriela Ferreira 1,2,3, Duarte Seixas 1,2,3,4 , Catarina Guimarães-Teixeira 3,4, Rui Henrique 3,4,5,6 , ...