Fig. 1From: Perioperative outcomes of uniportal versus three-port video-assisted thoracoscopic surgery in lung cancer patients aged ≥ 75 years old: a cohort studyFlow diagram for eligible patients enrollment. *: The number of each exclusion standard cannot be added up to the total number of excluded patients because one patient may match multiple criteria. VATS: Video-assisted thoracoscopic surgery. TNM: Tumor-node-metastasisBack to article page