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. 2021 Dec 28;10(1):59. doi: 10.3390/biomedicines10010059

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

An overview of microgravity analogues. (a) The head-down bed rest experiment configuration (taken from the National Aeronautics and Space Administration (NASA) and Deutsches Zentrum für Luft-und Raumfahrt (DLR), CC BY-NC-ND 3.0 [56]); (b) a commercially available rotating wall vessel; (c) a commercially available three-dimensional clinostat; (d) a commercially available desktop random positioning machine; and (e) experimental setup for a parabolic flight, where image (1) shows the Airbus 310 aircraft used for the parabolic flight, picture (2) shows the incubator used for the experiment, and image (3) gives an impression of the inside of the incubator prior to take off of the flight. The images of (e) were published by Nassef et al. in [57].