There are multiple definitions:

1. obstructive lung disease(English)

   • ACO, COPD, e-COPD, IgE, NSA, SA
   • Pulmonology, Asthma
   • https://doi.org…2931-017-0667-x

2. open lumbar discectomy(English)

   • DGT, LLDH, ODI, PELD, VAS
   • Spine (or spinal cord), Surgery
   • https://doi.org/10.1111/os.13313