Only published manuscripts are depicted in the table. Other studies comparing horse and rabbit ATG as first therapy have been reported in abstract form only. For consistency, hematologic response rates at 6 months are shown whenever possible. Recent uncontrolled reports from Asia (mostly in abstract form) using rabbit ATG are showing results superior to that observed in the United States and Europe as frontline therapy in SAA, suggesting an influence of ethnicity in outcomes after rabbit ATG. Adapted with permission from Scheinberg and Young.¹