That's the technical term for the phenomenon where unflattering data gets lost, gets unpublished, is left missing in action, and they say the results described here "might have provided an early warning of trouble ahead."
Det er den tekniske term for fænomenet hvor uflatterende data forsvinder, forbliver upublicerede, og de siger de resultater, der er beskrevet her "måske havde givet en tidlig varsling  af problemer forude."