CORRECTIONS AND CLARIFICATIONS

摘要

News Focus: "What shall we do with the x-ray laser?" by A. Cho (10 December, p. 1470). The story mistakenly states that Linda Young, an atomic physicist at Argonne National Laboratory in Illinois, and colleagues shined x-rays from the Linac Coherent Light Source onto xenon gas. The physicists used neon. News Focus: "Genes link epigenetics and cancer" by J. Kaiser (29 October, p. 577). The article failed to note that a Canadian team is among the researchers who have found cancer genes involved in modifying chromatin [K. C. Wiegand et al., N. Engl.J. Med. 363,1532 (2010)].