Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0020-7292(05)00371-1
Biopsy free resource MedlinePlus Health Information https://medlineplus.gov/biopsy.html
subscription/membership/fee required Wiley https://doi.org/10.1016/j.ijgo.2005.06.015