A more thorough explanation:

Definition: Side reports are unofficial volumes of case reports or collections of cases that were omitted from the official reports.

For example, a law firm may compile a side report of cases that were not included in the official reports due to various reasons such as lack of significance or space constraints. These side reports can be useful for legal research and analysis.

Another example of side reports is in medical research. Researchers may compile a side report of cases that were not included in the official clinical trial reports due to various reasons such as adverse effects or incomplete data. These side reports can provide valuable insights into the efficacy and safety of a particular treatment.

In summary, side reports are unofficial collections of cases that were not included in the official reports. They can provide additional information and insights for research and analysis.