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. 2022 Jun 6;13:919942. doi: 10.3389/fendo.2022.919942

Figure 1.

Figure 1

Early closed-loop technologies: (A) Components of the Biostator (reproduced from Fogt et al., 1978); (B) A mobile version of the Biostator (reproduced from Pfeiffer 1987) (10, 11).