library_construction_protocol: Total RNA was isolated and purified using TRIzol™ LS Reagent. RNA quantiy and quality were determined using Nanodrop One and Agilent Bioanalyzer. All samples had RNA integrity number (RIN) values > 8. All the RNA-sequencing procedures were performed by Macrogen (Korea). Libraries were sequenced using Illumina's HiSeq 2000.