PFAPA flares observed during COVID outbreak: can emotional stress trigger PFAPA attacks? A multicenter cohort study oleh Yoel Levinsky, Yonatan Butbul Aviel, Sabreen Abu Ahmad, Mor Broide, Yulia Gendler, Neta Dagan, Michal Gafner, Hadar Gavra, Shelly Kagan, Kfir Kedar, Hamada Mohammad Natour, Rotem Tal, Tamar Veres, Gil Amarilyo, Liora Harel