The existing research of the berlin patient (https://en.wikipedia.org/wiki/Timothy_Ray_Brown) indicates the likely elimination of HIV was graft vs. host disease (https://en.wikipedia.org/wiki/Graft-versus-host_disease#HIV_...).

The NY Times doesn't mention graft vs. host, but the doctor treating the berlin patient says no one else was cured undergoing the treatment the berlin patient underwent. According to records, 6 additional people were thought to be cured. I couldn't find any follow-up on them. (https://www.newscientist.com/article/mg23431244-400-immune-w...)