title: Longitudinal studies, sequential design, and grant renewals: what to do with preliminary data.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Veatch
mesh_terms: D030881:Disclosure; D026724:Ethical Review; D004989:Ethics; D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D012306:Risk; D018570:Risk Assessment