SPDL1 and lung cancer: sPD-L1 levels in the lung cancer patient specimens were 146 pg/mL, 414 pg/mL, 269 pg/mL, 174 pg/mL, and 199 pg/mL, respectively, whereas the sPD-L1 results for the healthy control specimens were 274 pg/mL, 167 pg/mL, 184 pg/mL, 419 pg/mL, and 239 pg/mL, respectively.