title: Response to Brimacombe et al., birth order and its association with the onset of chronic fatigue syndrome.
authors.forename: Boudewijn
authors.initials: B
authors.lastname: Van Houdenhove
mesh_terms: D001722:Birth Order / Q000523:psychology*; D019317:Evidence-Based Medicine; D015673:Fatigue Syndrome, Chronic / Q000209:etiology* / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male