There are multiple definitions:

1. Raad voor de Volksgezondheid en Zorg(Dutch)

   • NRV, RGS
   • Public Health, Organizations (documentation), Health care, Organizations (governmental)

2. relatively vulnerable zone(English)

   • such as outer walls of bifurcations and the convex surface of curved arteries, where atherosclerosis is often more serious compared with their neighborhoods
   • Vascular disease, Hemodynamics
   • https://doi.org…093/cvr/cvab001