Additional file 2 of Decreased sphingomyelin (t34:1) is a candidate predictor for lung squamous cell carcinoma recurrence after radical surgery: a case-control study

Additional file 2: Sheet 1. The full list of area values for the 1745 lipid species identified. Sheet 2. List of the intensity ratios according to the lipid head groups. Sheet 3. List of the intensity ratios according to the sphingomyelin species