The work was done by researchers at St. Michael's Hospital and the University of Toronto, in collaboration with the WHO and researchers at the University of Oxford.
      
      
      
        Nav Persaud, Maggie Jiang, Roha Shaikh, Anjli Bali, Efosa Oronsaye, Hannah Woods, Gregory Drozdzal, Yathavan Rajakulasingam, Darshanand Maraj, Sapna Wadhawan, Norman Umali & Ri Wang
      
      
      
      
        Lorenzo Moja & Nicola Magrini
      
      
      
      
        Marcy McCall, Jeffrey K Aronson, Annette Plüddemann & Carl Heneghan