“…The non-exposed include so-called "early entrants," those who entered the city only after the burst to perform rescue work, see relatives, and the like. This subgroup has long been controversial because some Japanese investigators have claimed that the early entrants have experienced an unduly high incidence of leukemia (41). Within the non-exposed group of the LSS sample, they are identifiable and ABCC studies have revealed no suggestion of excess mortality (34); the dosimetry research suggests that their average exposure was probably not biologically significant (42).…”