Early expansion of allergen-responsive LAP+ B regulatory cells in allergic rhinitis but not in allergic asthma subjects during allergen immunotherapyAstrid L. Voskamp1, Nicolette W. de Jong2, Simon P. Jochems1, Arifa Ozir-Fazalalikhan1, Luciën E.P.M. van der Vlugt1, Koen A. Stam1, Gert-Jan Braunstahl3,4, Gertrude M. Möller5, Roy Gerth van Wijk2, Hermelijn H. Smits11Department of Parasitology, Leiden University Center for Infectious Diseases (LU-CID), Leiden University Medical Center; Leiden, The Netherlands.2Dept of Internal Medicine, Section Allergology and Clinical Immunology, Erasmus University Medical Center; Rotterdam, The Netherlands.3Department of Pulmonology, Franciscus Gasthuis and Vlietland, Rotterdam, 3045 PM, the Netherlands.4Department of Pulmonology, Erasmus Medical Center, Rotterdam, 3015 GD, the Netherlands.5Netherlands Center of Clinical Occupational Medicine, The Netherlands.