Seven professors from Israeli universities will not participate in a conference on Historical Trauma at a university in South Africa after pressure from boycott groups against Israel, JTA reported on Thursday.

The four-day conference, entitled “Recognition, Reparation, Reconciliation: The Light and Shadow of Historical Trauma,” will begin on December 4 at Stellenbosch University.

Last week, 18 pro-Palestinian Arab groups called on the conference’s organizers, speakers, participants and sponsors to withdraw Israeli participation in the conference. Among the groups are South African Jews for a Free Palestine.