| Name | Info | Provider | Link |
|---|---|---|---|
| Blood Transfusion and Donation | free resource | MedlinePlus Health Information | https://medlineplus.gov/bloodtransfusionanddonation.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30747700/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/30747700 | |
| free resource | Data Conversion Labs | https://doi.org/10.2450/2019.0198-18 |