Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1091-255X(23)00765-5
Appendicitis free resource MedlinePlus Health Information https://medlineplus.gov/appendicitis.html
subscription/membership/fee required Springer https://link.springer.com/article/10.1007/s11605-020-04753-w