“…To compare d4T utilization across EuroSIDA, six regions were established according to the country of residence of the patient, as in previous EuroSIDA studies [22]: Southern Europe (South): Greece, Italy, Israel, Portugal and Spain; West Central Europe (West Central): Austria, Belgium, France, south Germany, Luxembourg and Switzerland; Northern Europe (North): Denmark, Finland, north Germany, Ireland, the Netherlands, Norway, Sweden and the UK; East Central Europe (East Central): Bulgaria, Croatia, the Czech Republic, Hungary, Poland, Romania, Serbia and Slovakia; Eastern Europe (East): Belarus, Estonia, Latvia, Lithuania, the Russian Federation and the Ukraine; and Argentina.…”