High quality total RNA was extracted and purified as previously described (Kenny et al. 2016 (link)). cDNA was generated by using SMARTer polymerase chain reaction (PCR) cDNA Synthesis kit (Clontech). Gene-specific primers were designed for each gene of interest (supplementary S5, Supplementary Material online). PCR products were cloned into the pGEM-T Easy vector (Promega, Madison, WI, USA). Linearized template DNA (amplified from plasmid with T7/SP6 primers) was used to synthesize RNA probes with either T7 or SP6 RNA polymerase (Life Technologies), and DIG-labeling mix (Roche, Indianapolis, IN, USA). WISH protocol was performed, as previously described (Perry et al. 2015 (link)).