For cDNA synthesis, 1 µg of total RNA was reverse transcribed using TaqMan® Reverse Transcription Reagents (Applied Biosystems). qPCR was performed using TaqMan® Gene Expression 20X primers for Serpinb2/SerpinB2 (Mm00440905_m1), Cebpb (Mm00843434_s1) and β-actin (Mm00607939_s1) (Applied Biosystems).