[1] Pfizer Inc, New York, NY USA
[2] Norton Infect Dis Inst, Louisville, KY USA
[3] Sinai Hlth Syst, Toronto, ON, Canada
[4] Shared Hosp Labs, Toronto, ON, Canada
[5] Pfizer Inc, Vaccine Clin Res, Collegeville, PA USA
[6] Univ Rochester, Sch Med, Rochester, NY USA