title: Trials and tribulations.
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D017321:Clinical Trials, Phase I as Topic; D015316:Genetic Therapy / Q000009:adverse effects / Q000401:mortality / Q000592:standards*; D005822:Genetic Vectors / Q000009:adverse effects; D002836:Hemophilia B / Q000235:genetics / Q000628:therapy*; D006801:Humans; D007258:Informed Consent; D018579:Patient Selection; D012107:Research Design; D012449:Safety; D016896:Treatment Outcome