Filename	Category_Code	Column_Number	Data_Label
GSE74075_Clinical_data.txt		1	SUBJ_ID
GSE74075_Clinical_data.txt	Subject+Demographics	2	Gender
GSE74075_Clinical_data.txt	Subject+Demographics	3	Age
GSE74075_Clinical_data.txt	Subject+Demographics	4	BMI
GSE74075_Clinical_data.txt	Subject+Medical_History	5	Smoking Pack-Years
GSE74075_Clinical_data.txt	Disease_Ontology	6	Diagnosis