Temporal Variations in Respiratory Syncytial Virus Epidemics, by Virus Subtype, 4 Countries. - Staadegaard, Lisa; Meijer, Adam; Rodrigues, Ana Paula; Huang, Sue; Cohen, Cheryl; Demont, Clarisse; van Summeren, Jojanneke; Caini, Saverio; Paget, John (Emerging Infectious Diseases, 2021)