1 Laboratory for Mucosal Immunity, Center for Integrative Medical Sciences, RIKEN Yokohama Institute, Tsurumi-ku, Yokohama 230-0045, Japan.
2 Laboratory for Mucosal Immunity, Center for Integrative Medical Sciences, RIKEN Yokohama Institute, Tsurumi-ku, Yokohama 230-0045, Japan sidonia.fagarasan@riken.jp.