Fig. 2
From: Trauma systems in high socioeconomic index countries in 2050
Theoretical Volume-Proficiency-Ownership relationship in trauma networks; the higher the volume in referral centers (= level-1 centers), the higher their level of case exposure and proficiency, the higher the risks of decreased proficiency and network ownership of lower volume (= level-2 and 3); (adapted from Hietbrink et al. [76]