Correction: Biosimilar recombinant follitropin alfa preparations versus the reference product (Gonal-F®) in couples undergoing assisted reproductive technology treatment: a systematic review and meta-analysis.

Correction: Biosimilar recombinant follitropin alfa preparations versus the reference product (Gonal-F®) in couples undergoing assisted reproductive technology treatment: a systematic review and meta-analysis This was based on the mean ± standard deviation (SD) number of oocytes retrieved, which was reported by Hu et al. in Table 2 of their publication (14.9 ± 0.5 for Follitrope [ I n i = 336] and 12.8 ± 0.9 for GONAL-f® [ I n i = 110]) [[2]]. When comparing the SD values reported in Table 2 [[2]] with those from the other four RCTs included our meta-analysis (NCT01121666, NCT01687712, ISRCTN74772901 and NCT03088137) [[1]], the values are unusually small and inconsistent with the range of SDs reported for the other four RCTs. [Extracted from the article]