There are multiple definitions:

1. nitroglycerin(English)

   • Cardiology

2. normal tension glaucoma(English)

   • LTG
   • Ophthalmology

3. national treatment guideline(English)

   • may refer to quality-assurance standards for malaria case management
   • RDT
   • Therapeutic approaches, Guidelines, Malaria
   • https://doi.org…2936-017-1800-5

4. non-transgenic(English)

   • TG
   • Transgenic animal
   • https://doi.org…mcc.2021.03.009