From a production perspective, these nanoparticles are easily obtained because they are readily produced in large industrial scales.
Bone marrow mesenchymal cell transplantation is easy to use clinically because cells can be easily obtained and can be multiplied without losing their capacity of differentiation.
Methanol as fuel has numerous advantages: simplicity in handling, storage, and transport; low cost and renewability because it can be easily obtained from fermentation of agricultural products [4, 5, 6].
The use of bone marrow mononuclear cells (BMMNCs) as a source of mesenchymal stem cells (MSCs) for therapy has recently attracted the attention of researchers because BMMNCs can be easily obtained and do not require in vitro expansion before their use.
BM-MSCs represent the optimal candidate for cell therapy because they can be easily obtained from a bone marrow aspirate and expanded on a large scale before autotransplantation, avoiding ethical problems.
Because these cells can be easily obtained from pre-selected donors, the possibility of creating such a panel is very likely in the foreseeable future.
Moreover, application of liver slice models can reduce the use of laboratory animals, because liver tissue can be easily obtained from the slaughterhouse.
We did not include unpublished studies (e.g., unpublished manuscripts, conference presentations) because their data could not be easily obtained, verified, or examined by readers.
Fingerprints are used as a means of personal identification because they have a high relief, more evident patternings, and can be easily obtained.
Because of the prevalence of tonsillectomy procedure, tonsils are easily accessible, particularly from young donors and, if necessary, tonsillar biopsy can be easily obtained without major complications under local anesthesia.
