Table 1. Summary of the clinical information of the ESCC samples used in this study.

Sex	Male	13
	Female	7
Histology	Squamous cell carcinoma	19
	Basaloid squamous cell carcinoma	1
Tumor location	Cervical esophagus	1
	Upper thoracic esophagus	2
	Middle thoracic esophagus	13
	Lower thoracic esophagus	3
	Abdominal esophagus	1
Tumor stage	II	2
	III	14
	IV	4
Age	≥60	18
	<60	2
Smoking status	Smoker	14
	Non-smoker	6
Alcohol drinking status	Drinker	16
	Non-drinker	4
Response to chemotherapy	Responder	10
	Non-responder	10