We are very thankful to all of our collaborators who help us propel our research forward. The list below includes some of our major collaborators with whom we work regularly on active projects. Shlomo Havlin (Bar Ilan University, Israel) Amir Bashan (Bar Ilan University, Israel) Ruslan Medzhitov (Yale, USA) Yang-Yu Liu (Harvard, USA) Ronny Bartch (BIU, Israel) Miri Adler (Hebrew University, Israel) Galit Lahav (Harvard, USA) Jan Vijg (Albert Einstein College of Medicine, USA) Misako Takayasu (TokyoTech, Japan) Yukie Sano (University of Tsukuba, Japan) Binyamin A. Knisbacher (BIU, Israel) Xu-Wen Wang (Harvard, USA) Jianxi Gao (RPI, USA)