Considerations about true ambispective observational research

License

The Cuban Journal of Medicine protects the author's patrimonial rights. However, it is licensed under a Creative Commons Licensehttps://creativecommons.org/licenses/by-nc/4.0/deed.es_ES which permits unrestricted non-commercial use, distribution and reproduction in any medium, provided that the primary source of publication is duly cited. The author always retains his moral rights.

You are free to:

- Share - copy and redistribute the material in any medium or format.

- Adapt - remix, transform and build upon the material

- The license cannot revoke these freedoms as long as you follow the terms of the license.

Under the following terms:

- Attribution - You must give proper credit, provide a link to the license, and indicate if changes have been made. You may do so in any reasonable manner, but not in such a way as to suggest that you or your use is supported by the licensor.

- Non-Commercial Purpose- You may not make use of the material for commercial purposes.

- No Additional Restrictions - You may not apply legal terms or technological measures that legally restrict others from making any use permitted by the license.