In the original article, there was an error. The name of the suppliers of the ProtoTissueTM bioreactors and BioArray Matrix (BAM) system were incorrectly provided as the suppliers have pointed out the error to the authors.
A correction has been made to Materials and method section; subsection 2.1.1. Two-dimensional monolayers and three-dimensional spheroids.
Compact, intact cell aggregates were hand-picked and transferred into ProtoTissue™ bioreactors (CelVivo ApS, DK-5491 Blommenslyst, Denmark; Cat. no 010) to facilitate the formation of spheroids. The spheroids were incubated in a rotating BioArray Matrix (BAM) system (CelVivo ApS, Denmark) at standard culture conditions for 30 days, with media exchanged every 2–3 days.
The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.