Workflows of RNA-seq library preparation. Red indicates steps only applied to fresh frozen (FF) samples, and blue indicates steps only applied to formalin-fixed paraffin-embedded (FFPE) samples. (*) Indicates different ribosomal RNA (rRNA) depletion methods that result in two different TotalRNA protocols, that is, RiboZero for I.TotalRNA and RNase H for K.TotalRNA protocol. CR, coding region capture protocol; deM, demodification protocol; mRNA, mRNA-targeting protocol; PCR, polymerase chain reaction; sRNA, sense RNA protocol.