title: Reply to Walk et al.
authors: A S
authors: AS
authors: Walker
authors: D W
authors: DW
authors: Eyre
authors: D W
authors: DW
authors: Crook
authors: T E A
authors: TE
authors: Peto
authors: M H
authors: MH
authors: Wilcox
mesh_terms: D016360:Clostridioides difficile / Q000302:isolation & purification*; D003015:Clostridium Infections / Q000382:microbiology* / Q000401:mortality*; D005260:Female; D006801:Humans; D008297:Male