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Hepatic function during long-term collagen sandwich cultures of fresh (grey), cryopreserved (blue) and bulk droplet vitrified (green) hepatocytes. a. Urea production. b. Albumin synthesis. Letters: p<0.05; a: fresh vs cryopreserved; b: fresh vs bulk droplet vitrified; c: cryopreserved vs bulk droplet vitrified. Error bars: SD.
