architecture. South America Argentina HL7 Argentina formed in 2000 in Argentina with just five original members. Economic instability in the country meant that any expansion of the affiliate was virtually impossible until 2004, but they now have more than twenty members, consisting of an 80/20 membership split in terms of organization/private subscriptions. Currently, the largest HL7 implementation in Argentina can be found at the Hospital Italiano de Buenos Aires (HIBA). References Health informatics