1. Cross-reactivity and tolerability of aztreonam and cephalosporins in subjects with a T cell–mediated hypersensitivity to penicillins 
Antonino Romano, MD, Francesco Gaeta, MD, Rocco Luigi Valluzzi, MD, Michela Maggioletti, MD, Cristiano Caruso, MD, Donato Quaratino, MD 
Journal of Allergy and Clinical Immunology 
Volume 138, Issue 1, Pages (July 2016)
DOI: /j.jaci
Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

2. Fig 1
Chemical structures of penicillins, cephalosporins, and aztreonam, with the amino group, common β-lactam ring, dihydrothiazine ring, and thiazolidine ring highlighted in gray.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions