SIR: I thank Dr Renton-Power (Letters, October 2013) for his observations concerning my article (September 2013) on the corrupting influence of utilitarianism in paediatric hospitals. It is no surprise that some in my circle of acquaintances increasingly seek out experienced doctors who respect the old Hippocratic values he affirms. A recent editorial in the science journal Nature (issue of September 12, 2013) flagged several concerns regarding genetic screening resembling those aired in my Quadrant piece, but included a shocking technical detail I overlooked: “Increasing the number of conditions being screened for will necessarily cause more false positives—as many as twenty…