Ex vivo STAT3 phosphorylation in circulating immune cells: a novel biomarker for early cancer diagnosis and response to anti‐PD‐1 therapy - Sung‐Woo Lee; Young Ju Kim; Saei Jeong; Kyung Na Rho; Jeong Eun Noh; Hee‐Ok Kim; Hyun‐Ju Cho; Yoo Duk Choi; Deok Hwan Yang; Eu Chang Hwang; Woo Kyun Bae; Sook Jung Yun; et al. (Cancer Communications)