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. 2021 Feb 2;43(5):1103–1116. doi: 10.1007/s10529-021-03076-3

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© The Author(s) 2021

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Fig. 4 — Human T-cell viable cell density in the T-flask, the original baffled ambr250 vessel and the unbaffled elephant ear A impeller vessel (n = 3). Data shown as mean ± SD. The black arrows indicate a medium addition (days 3 and 4) and exchange (day 5). Statistical difference (P) values were equal to or below 0.05(*) or 0.01(**)