There are multiple definitions:

1. improved multilayer network(English)

   • EEG, ELTH, ELTS, HC, MN, PLI, PLV, RF, SCZ
   • Machine learning, Mental health, Brain (dys)function
   • https://doi.org…hum.2022.799881

2. internal mammary node(English)

   • Oncology, Lymphatic system/lymphoma
   • https://doi.org…cao.2022.02.007

3. intramedullary nail(English)

   • refers to the the plate osteosynthesis method
   • NSA, PHF
   • Orthopedics, Surgery, Injury, Skeleton and bone (formation)
   • https://doi.org…jtes.2023.64225