Correction

We have previously demonstrated the expression of inhibin subunits in endometrial tissues and used β-actin primer pairs to perform a PCR analysis loading control [1]. However, instead of using the mentioned β-actin primer pairs from a commercial molecular biology supplier, we used the β-actin primer pair listed in Table 1. All depicted primer pairs in Table 1 were designed and established by our group, and synthesized by the supplier Biomers.net (Ulm, Germany).

Table 1 Primer sequences and length of amplification products