There are multiple definitions:

1. orthotopic liver transplantation(English)

   • OKT3, ALT, AST, HAP
   • Hepatology, Transplantation, Liver disease
   • https://doi.org…chsurg.2011.240

2. osteochondral lesion of the talus(English)

   • occurs in up to 70% of acute ankle sprains and fractures, and becomes increasingly recognized with the advancements in cartilage-sensitive diagnostic imaging modalities
   • ACI, AOT, BMS, MACI, MRI
   • Musculoskeletal system, Injury
   • https://doi.org…12/wjo.v8.i1.12